
Fix Windows Security 404 Not Found on Startup
When Windows Security shows a 404 error on startup, it typically means the app can't find its req...

When Windows Security shows a 404 error on startup, it typically means the app can't find its req...

You try to open a folder in Outlook—Inbox, Sent Items, or a custom folder—and get an “Access Deni...

You open Chrome after a crash and see a generic welcome screen instead of your bookmarks, history...

After a Windows update, you might see a DNS error when opening Microsoft Store. The app may fail ...

After a Windows update, you might find the search bar stops working, returns no results, or shows...

If you're troubleshooting a stubborn app or driver issue, Windows Security (formerly Defender) mi...