Upgrading from Windows Vista 64-bit Home Premium to Windows 7 64-bit Home Premium might lead to compatibility issues with PunkBuster in games. Here are a few pointers on why PunkBuster might be disabled or removed after the upgrade: 1. Driver Compatibility: Ensure that your system drivers, especially the graphics card and network drivers, are up to date. Outdated drivers can cause conflicts with PunkBuster services. 2. User Account Control (UAC): Windows 7 might have stricter UAC settings compared to Vista, which could impact how PunkBuster functions. Try running games with elevated privileges to see if it resolves the issue. 3. Firewall and Antivirus Settings: Check if the firewall or antivirus software on Windows 7...