kill3rb

i dont have any idea what kind of HDD it is. I would generally consider myself pretty handy with a computer but most of this stuff is going over my head.. lol I deleted some old files i dont use any more and its still super filled up but i have like 6 gb available now. lol e: also, i very very highly doubt its any sort of virus. I am pretty careful and dont believe i have picked any up.

So, i was trying to scan my micro SD card when my computer freaked out and blue screened. Said something about a memory dump. I restarted and everything was going suuuuper slow. I ran a scan disk and a defrag, took forever but it was still slow after. I restarted and it was working close to normal but it said that i have 0 free space on my hard drive when i should have 30+ gigs. I even started deleting file and removing programs, none of which seemed to affect the fact the mard hard drive is now "full". So i restart again and it is back to having 30+ gigs of free HDD space. I was surfing some of my usual sights when it tells me once again my HDD is full. I have even deleted temporary files, though where 30 gigs of temporary files would come from... i dont know. Any insight?