Hi and welcome to TSF
It seems that you are infected and that you have to save the data on that computer. As the security section is better suited for this I would like you to follow the instructions in this as best as you can:
(Updated!) IMPORTANT - Read This Before Posting A Log. Then I would like you to post a log here:
Hijackthis Log Help
Hope this helps, Regards,
TechPro5238