Unless a password’s been changed, it’s difficult for a typical user to tell if their computer or account is being hacked.
Router hacking is rare, but it can happen. I’ll discuss what it is.
Image backups are excellent protection against almost all forms of data loss. They’re not really intended to make transferring to a new computer easier, though in rare circumstances they can come in handy for that too.
If your anti-malware tools removed the malware but this browser hijack keeps coming back, then you might be doing something to invite it back on to your system.