Knowledge base for software setup, errors, and daily tool work.

Fix 'Permission Denied' in Ubuntu Terminal

You type a command in the Ubuntu terminal and get Permission denied. This usually me...

Fix Windows Security 'Permission Denied' Error When Settings Won't Open

You click Windows Security (formerly Windows Defender) and get a "Permission denied" or "This set...

Fix Windows Update Stuck on 'Checking for Updates' Due to DNS

If Windows Update gets stuck on 'Checking for updates' for minutes or hours, DNS issues are a com...

Fix Windows Defender Update Error 0x800f0906

When Windows Defender tries to update, you might see error 0x800f0906. This usually points to mis...

Fix BitLocker 'Cannot Access Drive Permission Denied' Error

Understanding the Error

You see 'Cannot access drive. Permission denied' when trying to o...

Windows Defender High Memory Usage Troubleshooting Checklist

Windows Defender (Microsoft Defender Antivirus) sometimes uses more memory than expected, especia...