I've found myself in similar circumstances a few times....the first couple of instances I spent the time to fix the problem...sure, it was a learning experience and I felt 'satisfied' that I had defeated the infection....but I also spent a hell of a lot of effort to get there...I then adopted a different approach when it was apparent a good deal of my time would be required...and that approach is to simply back up data and reformat and do a clean install of the OS etc....from the specs you give it appears as if you have a custom machine, which indicates you have the required OS disc in your possession and most likely have the knowledge to reload the OS and all the applicable drivers for your hardware...

I long ago adopted the use of dual boot machines where each OS resides on its own physical HDD and said HDDs are partitioned so that the OS resides on the first 30GB of the drive and the rest of the drive is used for data storage...this allows for transfer of data to another partition (which saves one from having to burn data to a cd/dvd for backup) and also limits the amount of space which needs to be defragmented so that one's OS runs to its fullest abilities....simple stored data rarely needs defragmentation but the OS and software does on a regular basis (about once a month)...

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So Long and Thanks for All the Files
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