So for the past week i've been getting the popup that says low disk space, then my computer kind of slows down/freezes for like a minute then goes back to normal. I went back and freed up a gig of space, but i still get the same problem. When the popup comes i go and check the hard disk space and suddenly its like 1.1 mb, then a few mins later it goes back to 1 gig. I scanned with hitmanpro, malwarebytes and super antispyware and nothing came up. I would really appreciate it if someone could give me some advice, thanks. Also i tried to just do a system restore a few days ago but it appears all my restore points have been deleted.