PC issues

Last week, I thought I needed a pc mechanic to help me with my computer. It's been acting really weird and I can't even access the internet properly. I thought I got another virus from some pop ups I accidentally clicked. These annoying pop ups victimized me one too many times. 3 laptops have been infected by some sort of a virus and to get them fixed will cost me almost the same price as a new computer. So guess what, I always end up just buying a new one. I have learned from this experience the importance of backing up important files in a disc. As for the pc mechanic? I'm glad I didn't call. The computer resolved itself without me doing anything. Weird!