Hi my name is Mike and I'm a college student. I will try to explain my problem as best as I can. Recently over my christmas holiday I sent in my laptop to Dell, it is a Dell Latitude D820, because it needed a new motherboard as well as palm rest. Both of those were replaced leaving all the original hardware in it. I just received it in the mail a few days ago. When I restarted the computer I had a blue screen on startup. I decided that because the motherboard had just been replaced and it was essentially a new computer, that I should reformat it so that it could be fresh. So I decided to reformat it. I know I had viruses on it when I sent it in so was planning on reformatting it anyways. After reformatting it though I still had problems. When I first started up windows I decided to do the windows updates. I noticed though that the laptop was being very slow after the updates. I then decided to check for malware, specifically rootkits, so I used combofix to do that. The reason I used combofix was because I once had a rootkit before and couldn't remove it by reformatting my laptop and after instruction on a blog like this was told to use combofix. After using combofix and turning off my computer and restarting it my laptop would go to a bluescreen each time I started it again. I then decided to reformat it again thinking that perhaps I did something to it when using combofix. I reformatted it again and then did the windows updates but was still having problems. I decided to try another rootkit program called rootkit revealer. It found some files and said that it cleaned them up. It seemed to be working until I restarted it and it bluescreened. I then decided to reformat it again and still had problems after the updates and then reformatted it again this morning. I ran the windows updates again this morning. This morning the updates were better than before but now I get the bluescreen when I restart my computer again. Like I said, I once had a similar problem about 2 years ago and joined a blog like this and was told that I had a serious rootkit and was given instructions on how to remove it. I'm not sure if it is a rootkit, but I think I have something which will not go away when I reformat my laptop. As I said previously, I'm a student and need to use this computer for school. Fortunately because the semester has just started and classes are not heavy I can go without it. Do you think that you can help me?