Before you start
- Administrator access
Method 1 Turn off real-time protection
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Step 1: Open Windows Security
Search for Windows Security in Start and open it.
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Step 2: Go to virus settings
Click Virus & threat protection, then Manage settings under Virus & threat protection settings.
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Step 3: Switch it off
Turn off Real-time protection and click Yes.
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Step 4: Turn it back on
When you’re done, switch it on again. Windows turns it back on automatically after a short time or at the next restart.
Method 2 Safer: add an exclusion instead
Protection stays on for everything else. Remove the exclusion when you no longer need it.
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Step 1: Open Exclusions
In Virus & threat protection > Manage settings, scroll to Exclusions and click Add or remove exclusions.
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Step 2: Add the item
Click Add an exclusion and choose File, Folder or Process for the trusted program, such as a development folder or a game mod tool.
Why does it keep turning back on?
That’s intentional: Windows doesn’t allow Defender to stay off permanently unless another antivirus is installed. When you install a third-party antivirus, Defender switches itself to passive mode automatically. Tamper Protection also stops apps from changing Defender settings behind your back; leave it on.
Troubleshooting
The switch is greyed out
Your PC is managed by work/school, or another antivirus is active. Check Windows Security > Settings > Manage providers.
Defender deleted a file I need
Go to Virus & threat protection > Protection history, select the item and choose Restore, only if you’re sure it’s safe.
Frequently asked questions
Do I need another antivirus if I use Defender?
No. Microsoft Defender is a capable, free antivirus built into Windows.
Does disabling Defender improve gaming performance?
Barely. Defender already reduces activity during games. Turning it off isn’t worth the risk.
Summary
Turn off Real-time protection in Windows Security > Virus & threat protection > Manage settings only briefly and only for trusted software. An exclusion is the safer long-term fix.
