Hello you may be dealing with a recurring Rootkit.
Try this temp file cleaner, if no joy see my steps below.
TFC by OT
Please download TFC
by Old Timer and save it to your desktop. alternate download link
Save any unsaved work. TFC will close ALL open programs including your browser!
Double-click on TFC.exe
to run it. If you are using Vista, right-click on the file and choose Run As Administrator
Click the Start
button to begin the cleaning process and let it run uninterrupted to completion. Important!
If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.
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 from step 9.
If Gmer won't run,skip it and move on.
Let me know if that went well.