Disable Windows Defender
Also searched as: defender off · disable antivirus · defender fps
What it does
Turns off Windows' built-in antivirus for a supposed FPS gain.
The honest verdict
Hard no. For the average rig the measured gain is a rounding error, and the cost is your only always-on protection — and some anti-cheats react badly to tampered security. If Defender's live scanning ever does cause stutter on one game (heavy disk I/O can trigger it), the right fix is a per-game folder exclusion, never killing your antivirus. Permanently blocklisted in Compy.
How Compy treats it
It's on Compy's refuse list. Compy will never apply this tweak — and if a guide already talked you into it, reversibility is the whole point of the app.
The Compy Blackbook holds 191 graded entries like this one, judged against your hardware — and every change it does make is reversible, with the receipt to prove it.
See Compy →