How to Secure a New Windows PC: Essential Settings for Beginners

A new Windows PC can feel secure simply because it is new.

However, a new computer still needs a few important security checks before you begin using it for email, banking, passwords, downloads, work files, or personal documents.

The good news is that modern Windows already includes several useful security features.

For beginners, the goal is not to change every advanced setting.

Instead, focus on a few essential areas:

Keep Windows supported and updated
Confirm antivirus protection is active
Keep the firewall enabled
Review SmartScreen and reputation-based protection
Set up secure sign-in
Protect important accounts
Back up important files
Download software carefully

This guide explains the most important security settings to review on a new Windows PC.

1. Make Sure You Are Using a Supported Version of Windows

Before changing any security setting, confirm that your version of Windows still receives security updates.

Windows 10 support ended on October 14, 2025.

For a newly purchased or newly configured PC, use a currently supported version of Windows.

A supported operating system is important because security updates fix vulnerabilities and improve protection against new threats.

Do not assume an old Windows installation is safe simply because antivirus software is installed.

2. Run Windows Update Immediately

One of the first things to do on a new PC is check Windows Update.

Open:

Settings → Windows Update

Install important available updates.

You may need to restart the computer and check again.

Updates can include:

Security fixes
Windows improvements
Driver updates
Microsoft Defender security intelligence
Reliability fixes

Do not postpone security updates indefinitely.

3. Keep Automatic Updates Enabled

For most beginners, automatic updates should remain enabled.

This reduces the chance that the PC stays vulnerable because an important update was forgotten.

You can still choose convenient restart times.

The important thing is to let the PC receive current security fixes.

4. Open Windows Security

Next, open:

Start → Windows Security

Windows Security is the central place for several built-in security features.

You may see sections such as:

Virus & threat protection
Account protection
Firewall & network protection
App & browser control
Device security
Device performance & health

Look for red or yellow warnings.

A new PC should not have unresolved critical security warnings.

5. Confirm Microsoft Defender Antivirus Is Active

If you are not using another trusted antivirus product, Microsoft Defender Antivirus should provide built-in real-time protection.

Open:

Windows Security → Virus & threat protection

Check that protection is active.

Real-time protection helps monitor files and applications while you use the computer.

Do not disable antivirus simply because a website or installer asks you to.

6. Run an Initial Quick Scan

Even on a new PC, running an initial Quick scan can be useful.

Open:

Windows Security → Virus & threat protection → Quick scan

This establishes a simple baseline and lets you confirm that Windows Security is functioning normally.

A clean result does not guarantee perfect security, but it is a useful starting point.

7. Review Protection History

Open:

Windows Security → Virus & threat protection → Protection history

Protection History shows recent security actions and detections.

On a new PC, you should review anything that appears unexpected.

Look for:

Threat found
Potentially unwanted application
Action needed
Security service turned off
Blocked application

Do not choose Allow on device unless you understand exactly what was blocked.

8. Keep Windows Firewall Enabled

Open:

Windows Security → Firewall & network protection

Make sure firewall protection is enabled for the network profile currently in use.

The firewall helps control network traffic between your PC and other devices or networks.

For beginners, there is usually no reason to disable it.

If an application asks for firewall access, only approve it if you recognize and trust the application.

9. Understand Public and Private Networks

Windows can apply different rules depending on whether the network is classified as:

Public
Private
Domain

For home Wi-Fi that you trust, Private may be appropriate.

For hotels, airports, cafes, or other shared networks, Public is generally safer because it limits certain forms of device discovery and sharing.

Do not mark an unfamiliar public network as trusted simply for convenience.

10. Review App & Browser Control

Open:

Windows Security → App & browser control

This area includes protections against unsafe:

Apps
Files
Downloads
Websites

It also includes reputation-based protection and, on supported systems, Smart App Control.

These protections can stop suspicious content before it becomes a bigger problem.

11. Keep Microsoft Defender SmartScreen Enabled

Microsoft Defender SmartScreen helps identify:

Suspicious websites
Phishing sites
Malicious downloads
Unrecognized apps
Potentially unwanted content

If SmartScreen displays a warning, investigate before bypassing it.

A warning does not always mean malware, but beginners should not casually ignore it.

12. Review Reputation-Based Protection

Inside App & browser control, review Reputation-based protection.

Where available, keep appropriate protections enabled for:

Apps and files
Microsoft Edge
Potentially unwanted apps
Phishing-related protection

These settings help Windows evaluate whether software and websites have a trustworthy reputation.

13. Understand Smart App Control

On supported Windows 11 systems, Smart App Control can help block malicious or untrusted applications.

Availability depends on your Windows version and configuration.

Do not worry if the option is not available on every PC.

The important point is to keep the protections supported by your system enabled unless you have a good reason to change them.

14. Check Device Security

Open:

Windows Security → Device security

Depending on your hardware, you may see protections involving:

Secure Boot
Core isolation
Security processor
TPM
Device encryption

Two PCs may show different options.

That is normal because hardware support varies.

Do not disable hardware-backed security features without understanding why.

15. Check Secure Boot Status

Secure Boot helps protect the startup process from certain low-level threats.

If your PC supports Secure Boot, Windows Security may show its status under Device security.

If Secure Boot is unexpectedly disabled on a new PC, investigate before making other changes.

Do not randomly change BIOS or UEFI settings unless you understand what the setting does.

16. Review Core Isolation

Some Windows systems support core isolation and related memory-integrity protections.

These features help isolate important Windows processes from certain attacks.

If Windows reports a compatibility problem, investigate the specific driver or application rather than simply disabling the protection permanently.

17. Set Up Windows Hello

Open:

Settings → Accounts → Sign-in options

Windows Hello can support:

PIN
Fingerprint
Facial recognition

Available options depend on your hardware.

For many beginners, Windows Hello provides a convenient and secure sign-in method.

A Windows Hello PIN is associated with that particular device rather than being used like a normal reusable account password.

18. Use a Strong Microsoft Account Password

If you use a Microsoft account to sign in, protect it with a strong and unique password.

Do not reuse that password on unrelated websites.

A strong Windows setup can still be undermined if the Microsoft account itself is compromised.

19. Enable Two-Factor Authentication

For your Microsoft account and other important accounts, enable two-factor authentication where available.

This adds another barrier if someone steals your password.

Especially protect:

Email
Microsoft account
Banking
Cloud storage
Social media
Password manager accounts

20. Review Account Recovery Information

Make sure recovery information is current.

Check:

Recovery email
Phone number
Backup authentication methods
Recovery codes where applicable

Outdated recovery information can make account recovery much harder.

21. Consider a Password Manager

A new PC is a good opportunity to stop reusing passwords.

A reputable password manager can help you:

Create strong passwords
Store unique passwords
Autofill credentials
Reduce password reuse

Do not store all important passwords in an unsecured text document on the desktop.

22. Check Whether Your Browser Passwords Need Attention

If you import passwords into a browser or password manager, review whether any passwords are:

Weak
Reused
Compromised

Change important exposed or reused passwords.

Use unique passwords for your most important accounts.

23. Install Only the Software You Actually Need

A new PC often comes with preinstalled applications.

You may also be tempted to install many utilities immediately.

Keep your setup simple.

Install software only when:

You actually need it
It comes from an official or trusted source
You understand what it does

Fewer unnecessary applications can mean fewer potential security and maintenance problems.

24. Download Software From Official Sources

When installing programs, prefer:

Microsoft Store
Official vendor websites
Trusted software repositories

Avoid unknown download portals, especially when they use large misleading “Download” buttons or bundled installers.

Before running an unfamiliar installer, scan it if appropriate.

25. Be Careful With Free “PC Cleaner” Tools

New PC owners are often targeted by advertisements promising:

Faster performance
Hundreds of detected problems
Driver repair
Registry cleaning
Virus removal
Instant optimization

Do not install random system cleaners because an advertisement claims your new computer has problems.

Use built-in Windows tools and reputable vendors instead.

26. Remove Unwanted Preinstalled Apps Carefully

Some new PCs include software you may never use.

Removing unnecessary third-party software can simplify the system.

However, do not uninstall unfamiliar Windows components or hardware tools without checking what they do.

If you are unsure, research the application before removing it.

27. Review Startup Apps

Open:

Task Manager → Startup apps

Review which applications start automatically with Windows.

Too many startup programs can reduce performance.

Unknown startup software can also deserve investigation.

Do not disable random driver, audio, touchpad, graphics, or security components simply because their names are unfamiliar.

28. Secure Your Web Browser

Your browser is one of the main entry points for online threats.

Make sure it:

Is updated
Uses built-in phishing and malicious-site protection
Has only necessary extensions
Blocks unwanted pop-ups appropriately
Does not allow suspicious notification permissions

Be cautious when installing browser extensions.

Extensions can have broad access to browsing data.

29. Review Browser Extensions

Open your browser's extension manager.

Remove extensions you do not recognize or need.

Avoid extensions that:

Come from unknown sources
Request excessive permissions
Change your search engine unexpectedly
Show unusual advertisements
Redirect pages

Keep only trusted extensions.

30. Review Browser Notification Permissions

Do not click Allow on every website notification request.

Malicious or low-quality sites can use browser notifications to send fake virus warnings and scam messages.

Review notification permissions and remove unfamiliar websites.

31. Turn On Ransomware-Related Protection When Appropriate

Windows Security includes ransomware-related settings.

Controlled Folder Access can help protect important folders from unauthorized changes by untrusted applications.

This can provide another security layer.

However, no ransomware protection replaces backups.

32. Set Up Backups Early

Do not wait until something goes wrong.

Decide how you will back up:

Documents
Photos
Videos
Work files
Financial records

Possible backup locations include:

External drives
Cloud storage
Another secure device

For important files, having more than one copy is safer than relying on one PC.

33. Protect Your Backup From Ransomware

If you use an external backup drive, consider disconnecting it when it is not needed.

A backup permanently connected to the PC may also be exposed during certain ransomware incidents.

Cloud backup and file-versioning features can also provide useful recovery options.

34. Turn On Device Encryption When Available

Some Windows PCs support device encryption or BitLocker-related protection.

Encryption can help protect data if the laptop is lost or stolen.

Availability depends on Windows edition, hardware, and configuration.

If encryption is enabled, protect the recovery key.

Do not lose access to it.

35. Save Your BitLocker Recovery Key Safely

If BitLocker or device encryption is active, store the recovery key somewhere safe.

Do not keep the only copy exclusively on the same encrypted PC.

A recovery key may be necessary after certain hardware, firmware, or security changes.

36. Rename the PC if Helpful

Giving the PC a recognizable name can make it easier to identify in:

Microsoft account device lists
Network settings
Remote management tools

Avoid using highly sensitive personal information in the device name.

37. Avoid Using an Administrator Account for Everything When Practical

Administrator privileges allow important system changes.

For advanced users or shared PCs, separating everyday activity from administrative tasks can reduce risk.

For beginners, the key principle is simpler:

Do not approve administrator prompts automatically.

Before clicking Yes, make sure you intentionally started the program requesting permission.

38. Understand User Account Control Prompts

Windows may display a User Account Control prompt when an application requests elevated permission.

Ask:

Did I intentionally start this program?
Do I recognize it?
Did I download it from a trusted source?
Does the request make sense?

Unexpected administrator prompts deserve investigation.

39. Do Not Disable Security Features for an Installer

A suspicious installer may say:

“Disable antivirus before installing.”

Treat that as a warning sign.

Do not disable:

Microsoft Defender
SmartScreen
Windows Firewall
Browser security
Other protections

unless you independently verify that the software is legitimate and understand the reason.

40. Create a Restore or Recovery Plan

Know what you would do if Windows becomes unusable.

Learn where to find:

Windows Recovery
Reset this PC
Advanced startup
Recovery drive options

You do not need to use these features now.

Simply knowing they exist can make recovery easier later.

41. Keep Important Software Updated Too

Windows Update does not update every third-party application.

Keep frequently used software current, including:

Browsers
PDF readers
Office software
Communication apps
Security tools

Outdated applications can contain security vulnerabilities.

42. Review Privacy Settings

A new PC is also a good time to review:

Settings → Privacy & security

Check options related to:

Location
Camera
Microphone
Notifications
App permissions

Only give applications access they actually need.

Security and privacy are related.

43. Be Careful on Public Wi-Fi

When using public networks:

Use the Public network profile
Avoid unnecessary file sharing
Prefer HTTPS websites
Avoid sensitive activity on suspicious networks
Keep firewall protection enabled

Do not automatically trust a Wi-Fi network because its name looks legitimate.

44. Learn to Recognize Phishing

Antivirus cannot stop every phishing attempt.

Watch for:

Urgent account warnings
Unexpected password-reset links
Fake invoices
Fake delivery messages
Messages asking for verification codes
Unusual payment requests

When possible, open the official website or app yourself instead of clicking a suspicious message link.

45. Know What to Do With Suspicious Files

Before opening an unfamiliar file:

Check the source
Show the full extension
Scan it
Review publisher information
Consider an additional reputation check
Do not disable antivirus

If you do not need the file, the safest choice may be not to open it.

46. Know What to Do After a Suspicious Link Click

If you click a suspicious link:

Close the page
Do not enter more information
Check whether anything downloaded
Change exposed passwords
Review account activity
Run a scan if appropriate
Contact your bank if payment information was exposed

Respond based on what actually happened after the click.

47. Keep Your New PC Physically Secure

Software security is not enough.

When leaving the PC unattended, press:

Windows key + L

This locks the computer.

Also avoid leaving an unlocked laptop in shared or public spaces.

48. A Beginner’s New Windows PC Security Checklist

Before you consider setup complete:

49. What You Do Not Need to Do

A secure new PC does not require you to:

Install five antivirus programs
Disable Windows Security
Buy every security product advertised
Constantly run full scans
Install random cleaning tools
Change every advanced Windows setting

A simple, maintained, understandable security setup is better than an overly complicated one.

50. Final Verdict

Securing a new Windows PC is mostly about getting the basics right from the beginning.

Use a supported version of Windows.

Install updates.

Keep Windows Security, Microsoft Defender Antivirus, and Windows Firewall enabled.

Review SmartScreen and reputation-based protection.

Set up Windows Hello and strong account security.

Download software carefully.

Use unique passwords, enable two-factor authentication, and create reliable backups.

Then keep the setup maintained.

For beginners, security does not need to be complicated.

A supported and updated Windows PC with built-in protections enabled, strong account security, careful downloads, phishing awareness, and dependable backups provides a solid foundation for everyday use.

Guide note: This article reflects Microsoft Windows security guidance available in August 2026. Windows features, security settings, supported versions, and menu locations can change over time and may vary by device hardware and Windows edition.