I’m getting a laptop next week and I have no idea what virus protection I should get for it. My three choices are Avg, Avast, and Avira. What virus protection do you use?

I already have Crap Cleaner, but my computer still runs pretty slow, is there any way to clean out any viruses or spyware (mine expired so I’m basically defenseless) for free? I would really like for my PC to run like it used to, any suggestions?

help please!!!!!!!!!!!!!!

I am trying to start a small business; which would entail; basic computer hardware, software repair and diagnostics. Television repair as well as game consoles. Can someone help me out? I know I would be able to turn it into a profitable business. I just need financial assistance.
The only thing I need the financial assistance with, is getting a few parts to help it move along.