Let's take some time out for data protection. We isolate it where possible, then back it up.
Do this and, the next time you're machine goes blip, all your data is separated from the system. Simply reinstall the OS and mount the data drive.
Ideally you have all data on an independent hard drive with only your OS and program files on the primary disk. If you don't have a second drive and don't want to afford one, afford one anyway. If you don't, Sod's Law says, you'll have a hardware failure.
Unless you've addressed this, for example during the installation with some operating systems, your drives allow anyone with access to your account to read and edit your files.
Compounding the risk is the fact that, the truth be told, user credentials are worth sweet diddly-squat if someone has physical access to your machine.