Basically what the thread title says
My pc has been running very slow for the past few days. I think it's been a while since it was defragged and it was my friend who did it then I need to do it again. My antivirus ran out yesterday morning and my DH didn't pay any heed to the mcafee sign saying open to viruses and went online anyway... but I downloaded a new antivirus mcafee last night, but today it took ages to start up... so I fear there may be a sneaky virus got in I am scanning at the minute, but think I also need to defrag... can anyone help me? I know it might be a longshot for a Saturday night..but i'd be most greatful?