This was probley my fult in the first place as i didn't check what type of file I was deleting. But that file was infected by a virus anyways. Since Norton couldn't remove the virus from any of the infected files i was forced to delete them. But I didn't know that one of these types of files were to be infected. So it was deleted.
After my computer froze for a minute I rebooted and I started getting the error "Windows cannot find sysrnj.exe". Now all I could do on my computer is surf the net. The only program active is Explorer.
Is there any way of restoring the file or reinstalling windows without formating my computer?