If there is one thing I can say with absolute certainty about using your computer it’s this: IT WILL FAIL.
Duplicate all of your files and put them somewhere safe. Off-site backup is an ideal solution. Homes and offices get burgled, damaged or burned to the ground. Your insurance company will not be helpful in this regard. Get all of your music files, all of your business documents and all of your photos and make sure that if the worst happened to your computer(s)… you would at least be able to cope.