My computer is slowing down, I do not know if it is a virus or what, I restarted my computer and then when it was loading it said that it is checking for file name ntfs, and it recommened to not stop the check but then it stops by itself and then the computer loads to open, I do not know what it is.. please if you have any idea what should I do let me know. I thought it was from my virus scan so I changed it to kaspersky the 30 day thing, but then I ran combo fix and now the anti virus it is not working and If I open control panel to delete something it wont let me.