An error occurred with Hijack This

Hi tech experts,
I am facing a terrible problem; I think my system is going to crash. I am getting this below error message; Hijackthis is not fixing the problem. Is there any other option to remove the virus from my system? And at the same I need to find the root cause of this error. Even I tried the TDSSkiller to clean the PC but nothing happened, not able to detect the problem. Please help me. Thanks.

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Error Details:
An unexpected error has occurred at procedure: modMain_StartScan()
Error #5 – Invalid procedure call or argument
Windows version: Windows NT 5.01.2600
MSIE version: 8.0.6001.18702
HijackThis version: 2.0.4
