If you see a BSOD like the one above (ATAPORT.SYS error), you may be the victim of a rootkit virus.
Most likely it comes from the malware family: Rootkit.Win32.TDSS

Kaspersky Anti Virus makes a free tool to remove this infection from your system.

The tool is called TDSSKiller.exe and can be downloaded here.

The tool has a simple GUI and can run on pretty much any system that has Windows Xp or newer operating system (64 bit or 32 bit).

You may have to boot into safe mode to run the tool. (To boot into safe mode: consecutively press F8 during boot until you are given a list of choices, one of them being to boot into safemode with networking.)

After running the tool and removing any infections, you must reboot your computer.  After that, run your antivirus to remove any remaining infections.

For more information on using the TDSSKiller.exe tool, visit Kaspersky’s support article:

http://support.kaspersky.com/faq/?qid=208280684