If you’ve landed on this page, you’re likely staring at a frustrating red error box in Cheat Engine. The message reads something like: "Scan Error: Thread 0. Please fill something in (100 upd)" . You’ve tried restarting, reinstalling, and maybe even switching games—but nothing works.
Not usually. The game is simply protecting its memory or Cheat Engine cannot access Thread 0. If you’ve landed on this page, you’re likely
CEWinDrv.exe /uninstall CEWinDrv.exe /install Then restart Cheat Engine. This fixes driver-level attachment issues causing Thread 0 failure. If you still see "cheat engine scan error thread 0 please fill something in 100 upd" , try these last-resort methods: Method A: Use Process Explorer to Check Thread 0 Download Sysinternals Process Explorer. Find your game’s process → Right-click → Properties → Threads tab. Look for Thread 0 (TID = main thread). If it’s suspended (Suspend Count > 0), the game is actively blocking Cheat Engine. You cannot fix this without modifying the game’s executable (not recommended). Method B: Try a Different Scanning Mode In Cheat Engine, click Memory View → Tools → Scan for code (Code Finder) instead of standard value scan. Some games block value scans but allow code scans. Method C: Virtual Machine Workaround Install Windows in a virtual machine (VMware or VirtualBox). Run the game and Cheat Engine inside the VM. The hypervisor isolates anti-cheat detection, and Thread 0 scans work normally. CEWinDrv