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Disable CSM in BIOS
CSM (Compatibility Support Module) is a BIOS/UEFI feature that enables legacy boot support for older operating systems and hardware. On modern PCs, keeping CSM enabled can sometimes interfere with full UEFI mode features and cause minor stability or performance issues. Disabling CSM ensures the system runs in pure UEFI mode, improves compatibility with modern features like Secure Boot, and reduces legacy boot overhead.
Warnings
- Only do this if Windows is installed in UEFI mode. If installed in Legacy/MBR mode, disabling CSM can prevent booting!
0 of 6 steps done
- Enter BIOS/UEFI: Restart PC and press the BIOS key during boot (commonly Del, F2, or F12)
- Find CSM/Legacy Boot setting: Look in Boot tab, Advanced, or CSM Support/Legacy Support menus
- Disable CSM: Set CSM to Disabled. If there's a Boot Mode option, ensure it's set to UEFI (not Legacy)
- (Optional) Enable Secure Boot: Turn Secure Boot to Enabled if your system supports it - this often becomes available only after CSM is disabled
- Save and Exit (usually F10), then boot into Windows and test your games
- If Windows won't boot: Go back into BIOS and re-enable CSM/Legacy Support
This tweak only works properly on UEFI installations. If your system is Legacy/MBR, you'd need to convert the system disk to GPT and boot in UEFI mode before disabling CSM.
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