: Open Control Panel > Programs and Features and uninstall these utilities to ensure they aren't overriding BIOS settings. 3. Adjust Windows Power Management
Even without overclocking, a failing CPU cooler or dried thermal paste can cause throttling and crashes. Monitor temps with HWiNFO64.
: Look for an option labeled "Load Optimized Defaults" or "Reset to Default" (often found in the "Save & Exit" tab).
Depending on how you overclocked your system (via software or the BIOS), the method to undo it varies.