Don't do it!!
There are NO FREE websites! Having an old computer myself, I've learned that it isn't worth the "FREE" part to down load anything that I'm unsure of. I've even found myself struggling when I've tried downloading free software that's supposed to help with a problem I'm having with my computer!
Ruben - one thing that I've learned to do ASAP when I feel I've screwed up something is to do a "System Restore" to an earlier date. This has on some occasions removed the "malware"