BSOD : ntfs.sys and ntoskrnl.exe

Hi,
I don't really remember what I was doing, when the netbook crashed, maybe looking at a video or browsing on the net .
I have since yesterday an alfa awus036H usb wlan adapter, maybe it's the reason , but I have the impression to have had other blue screen these two last weeks before these purchase.
I think, but no sure, it has happened maybe 4 or five times even if there are only 2 recent dumps in the C:\Windows\Minidumps folder .
I've zipped it and joined it .
I am having exams soon , so it's a pain to have problems with this damned netbook now ...
If someone has ideas about what it could be,
Thanks a lot
Bye
Cédric

Start by updating your video drivers as well as ATI Catalyst Control Center.