Checklists for software errors, setup, and tool workflows.

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Fix Remote Desktop Connection 404 Error in IIS

When you try to connect to Remote Desktop Web Access (RD Web Access) through IIS, you may see a 4...

Fix BitLocker DNS Error After Windows Update

After a recent Windows update, you might see a BitLocker error that mentions DNS, such as "BitLoc...

Fix Windows Update Authentication Failed Due to Group Policy

You try to run Windows Update and get an error like "Authentication failed" or "0x80070005" – and...

How to Fix Windows Security Keeps Crashing

If Windows Security (formerly Windows Defender) keeps closing unexpectedly, you may see error mes...

How to Fix MySQL Connection Refused and Permission Denied Errors

When you see ERROR 2003 (HY000): Can't connect to MySQL server on 'host' (111 Connection re...

How to Fix Windows Security Access Denied on Startup
If you see an "Access Denied" error when Windows Security tries to open at startup, the antivirus...