Apps, sign-in & security
Start menu and search, crashing apps, sign-in problems and malware.
- Can't sign in to Windows (forgotten password or PIN not working)
Troubleshooting
How to get back into Windows when you've forgotten your password, or your PIN is rejected. Separate routes for Microsoft accounts and local accounts, plus what to do if you're locked out.
- Signs of malware (pop-ups, browser hijacked) or Windows Security won't open
Troubleshooting
How to spot a malware infection or a fake virus warning, clean the PC with Windows Security and a browser reset, and what to do when the Windows Security app itself won't open or stays blank.