Ive tried a few things, but lemme start at the begining.
I got a error message yesterday morning when i started up. It said something about csrss.exe
So i started looking up stuff on it and from what i believe, i think i had a virus. I ran Avira and Malware's Anti Malware program and cleaned what i could with that. From then it seemed not to help so i looked around on some forums where i was told to go into Registry Edit and search for c:\windows\config\csrss.exe
So i did and i found the Shell file. They told me to delete it first, but then a few people told me not to delete, but to just Modify the name into Explorer.exe
So i did. And it stopped the error message, but my PC started really really slow. I cant take it much more, so i came here.