Why won't my computer restore to an earlier date?

My computer is infected with spyware. I do not know how the spyware came through. A friend advised me to set my computer back to an earlier date using system restore. For some reason, it cannot restore my computer back to the earlier date. I have tried...

A few days ago I tried to open a file in a different program, but instead, it changed a bunch of other files to that program. Now everytime I try to open one of them that program opens, and other programs do it too, such as the system restore file. Just...

I have restored it 4 times, every time i restore to an earlier date it works perfectly/normal, then a few days later the computer goes dead slow, when booting up or shutting down it makes a crackling sound and it takes ages to boot up and shut down same...

Ok...so my brother's computer went crazy and it won't allow him to get on the internet and it makes his entire computer IMPOSSIBLE to work with. It's soo slow and you have ...show more

I know that you go to control panel and all, but my computer has a virus, and this is the only way I know of to get rid of it, since I don't have access to the Internet because of it. It is really frustrating.

My computer was recently sent to the computer shop, where they had to restore it to an earlier date. But when they did that, they sent it back about 3 years. None of my backups seem to have worked, so I was wondering if it's possible to restore a computer...