How to Fix Error Code 0xC0000005: Application Error in Windows Vista

Here are several methods to resolve the error code 0xC0000005: Application error in Windows Vista:

1. Update Windows Vista: Ensure your Windows Vista is current with the latest updates and patches. To do this, navigate to Start > Control Panel > Windows Update and check for updates.
2. Run a virus scan: This error can result from a virus or malware infection. Conduct a full virus scan with your antivirus software to identify and eliminate any threats.
3. Check your RAM: Defective RAM can also trigger the error code 0xC0000005. Utilize the Windows Memory Diagnostic tool to inspect your RAM for issues. Access it via Start > Control Panel > Administrative Tools > Memory Diagnostics Tool.
4. Disable DEP: Data Execution Prevention (DEP) is a security feature in Windows Vista that might cause the error. To disable DEP, go to Start > Control Panel > System > Advanced System Settings > Performance Settings > Data Execution Prevention and choose 'Turn on DEP for essential Windows programs and services only.'
5. Reinstall the application: If this error appears when using a specific application, reinstalling it may resolve any corrupted files or settings causing the issue.
6. Perform a system restore: If none of the above methods work, try a system restore to revert to a previous state when the error was not present. Navigate to Start > Control Panel > System and Maintenance > Backup and Restore Center > Restore my computer to an earlier time.