If QuickBooks keeps experiencing connectivity issues, freezes, or multi-user errors, your antivirus may be the cause.QuickBooks Antivirus Exclusions can interfere by scanning or blocking QuickBooks files, resulting in failed connections or unexpected shutdowns. Creating antivirus exclusions for QuickBooks prevents these interruptions. Focus on excluding essential QB files like QBW32.exe, IntuitSyncManager.exe, and other executables within your QuickBooks installation path. For Windows Defender, use the security settings to add these files as exclusions; similarly, configure other antivirus apps to whitelist QuickBooks. Always install QuickBooks and Windows updates first, and confirm the firewall allows QuickBooks connections. These steps safeguard against file corruption and help QuickBooks run faster and error-free in multi-user or online environments. If stuck, seek professional help or consult antivirus support for detailed guidance.