Multiple antivirus suites running simultaneously
Two real-time antivirus scanners (e.g., Windows Defender alongside McAfee/Norton) lock the same file handles, causing severe system freezes.
Internal desktop parts run on harmless 12V DC voltage and cannot shock you. Simply unplug the wall power cable first, then touch the unpainted metal case frame to ground static electricity.
Common Symptoms & Tells
- Opening any executable causes a 5-10 second freeze
- Both Antimalware Service Executable and third-party AV show high CPU
- Files take excessively long to download or copy
Interactive Fix Checklist
0 of 4 steps completedUninstall redundant third-party antivirus suites
Having more than one real-time antivirus creates file lock contention. Use the vendor's dedicated removal tool (e.g., MCPR for McAfee, NRnR for Norton).
Verify Windows Defender is in active or passive mode
Open Windows Security → Virus & threat protection. If using a third-party AV, Defender should automatically enter passive mode without real-time file hooks.
Add exclusions for trusted developer or gaming directories
In Windows Security → Virus & threat protection settings → Exclusions, add folders with thousands of read/writes to prevent scan loops.
Reboot to release locked kernel file filters
Restart the PC to ensure removed antivirus kernel drivers (.sys) are fully unloaded from memory.
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