Hack or Virus causes BSOD

Hi, my computer has been repeatedly getting the BSOD over the past 2 months. I have found the core of the problem. It was a fake driver known as [ikmasa.sys]. I have tried deleting it but it keeps saying 'Cannot read from source file or disk'. I ran an AVG anti-rootkit scan and it appears ikmasa.sys is a rootkit. The detection name was "IRP hook, \FileSystem\Ntfs IRP_MJ_CREATE -> ikmasa.sys +0x22B1". Can anybody please tell me how I can remove it. I do not want to resort to using System Restore or formatting the computer.

Thanks for any replies.
Peter.

Hello and welcome. We need a deeper look. Please go here....
Preparation Guide ,do steps 6 - 9.

Create a DDS log and post it in the new topic explained in step 9,which is here Virus, Trojan, Spyware, and Malware Removal Logs and not in this topic,thanks.
If Gmer won't run,skip it and move on.
Let me know if that went well.