Earthling

I already solved my problem, just create new USER and, to save all my settings, copied my folder AppData from old user to new user. And now I use new Profile to work with comp, old one did not work correctly. The problem was - I started Defraggler - in a middle of defragging process all my prog-links (exe, ini, etc) become as a PDF files. I restart my comp - all my progs include autoruns, antivirus and all startup progs - didn't work. + All functions that starts from "control panel" gust start me PDF reader. I didn't fined dissition, that why I created new user, now I use NEW Profile (new user). And I delete Defraggler.

"Open With" - this is too cool and i don't know how to open Windows system files. For example - In which progs open rundll32.exe? "Default Programs" for OS can't be changed there everything in PDF. It can be, but I don't think that that was VIRUS - Kaspersky Crystal (Pure). My OS VISTA. I didn't understand what happen, but I created NewUSER transfer all my user/AppData to NewUSER/AppData and everything OK. But I still left old USER - and I don't know what can be done to fix it. There some problem in USER folders.

After Defragging my OS disk, every program file become like a PDF file (exe, ini, etc) when I trying to start any prog it start my PDF reader. I can't restore the OS from a saved points because this commend... open my PDF reader... Maybe there is some decision?