hi,to answer your questions, yes i just downloaded mbar anti-rootkit and ran it,it said no maleware was found, then i downloaded combo fix and tried to run it but it wont work,a window pops up saying im running win2000 but im running windows 8.1,so it will not run,,alot of the programs i have used say i have no ownership, how do i take ownership of the many files that say no ownership, is there a program build into win8.1 or a program i can run to take ownership of all these files,i have both passwords of mine and the man who did own it,i have used both to try to get into my bios to switch my boot order to dvd first,but mine or his password will not work to get me into my bios,there are alot of programs online that say there program will find or remove the password for bios and recovery but i dont want to make anything worse than they allready are,i have a windows 8.1 pro dvd and key but i cant use it til i somehow get win8.1 to boot from my dvd first,im thinking now maybe just go to my dvd drive in "this pc" and double click it and run windows 8.1 pro dvd that way, but again im afraid to make things worse,i dont understand why my password will not work for bios and recovery opions,or the guy who did own it ,either password will not work,my own password works fine for getting into win8.1 and for other things in win8.1,but wont work for bios or recovery,it dont make any sence to me, my password should work for everything or am i wrong in that line of thinking,i have a acer aspire x, mini desktop,with wireless card,it has 12 GB of ram, 5700 ati grafics,4 core chip, its a high end computer,but runs like its 10 years old, i have used allmost every program on the net to fix things like ownership,spyware,root kits,wireless adapter,both from the net and build in programs,if i could do a clean install id be all set and have a super fast computer like it should be,plus this problem of win2000 when i have win8.1, there are so many problems that i cant think of them all, i used sfc /scannow it says some file are missing,or cant fix problems found,i guess im lucky that i can even use this computer,thats why im scared to try some programs that say they can fix all problems or recover bios passwords, i stick to ccleaner and mbar super anti-spyware,there are so many problems that i think the only way to really fix my computer is do a clean install,there another program i used,cant think of the name of it now but it said some windows files are not in system 32, the file are there i guess but not where they should be,anything u can think of for the many problems i have i would be very thankful for any help or advice you can give me,,thank you so much for the help you allready gave me,i think the only way is a clean install to make this computer work the way it should,im ready getting upset and im allmost ready to try--go to my dvd and run win8.1 pro dvd that way,im just scare that it will only add to the many problems i allready face,,i dont think setting up win8.1 pro by going to my dvd and running it that way,im allmost ready to try it tho, but i rather do it from boot instead of running it while im allready into win8.1,i even gone to acer site many times to see if there was anything there that might help but all i get is my drivers,no other programs are listed there to help me do a clean install,thank you for your help and i will be checking everyday to see if you have come up with anything that will help me,take care and god bless,,