A: You likely have a persistent browser notification scam or adware. Follow Step 4 in Part 4 to reset notifications.

A: Disconnect from the internet immediately. Run a full offline antivirus scan. Change all your passwords from a clean device.

A: A genuine 408 error (network timeout) does not require a Windows reinstall. Only if your OS is infected by the fake 408exe malware should you consider a clean install.