Checklists for software errors, setup, and tool workflows.

Fix Windows Security Offline Installer Fails

When installing Windows Security (formerly Windows Defender) offline, the installer may fail sile...

Fix Missing Results After Windows Search Migration

After moving the Windows Search index to a different drive or folder, you may notice that search ...

Fix Outlook High CPU Usage Caused by Antivirus Scanning

Symptoms and Likely Cause

You notice Outlook consuming 50% or more CPU, making your syste...

Fix 502 Bad Gateway When Windows Search Not Working

You open Windows Search, type a query, and instead of results see a 502 Bad Gateway error. This u...

Fix Outlook Service Unavailable Error by Repairing Office Installation

You open Outlook and see the message: "Outlook service unavailable. Cannot start Microsoft Outloo...

Fix Windows Activation SSL Certificate Error Not Working

You're trying to activate Windows, but you see an SSL certificate error and activation fails. Thi...