OK lets now try FRST as I think we are on the track of the blighter now
CAUTION : This fix is only valid for this specific machine, using it on another may break your computer
Open notepad and copy/paste the text in the quotebox below into it:
CMD:ipconfig /release
CMD:netsh int ip reset
CMD:ipconfig /renew
REBOOT:
Save this as fixlist.txt, in the same location as FRST.exe
Run FRST and press Fix
On completion a log will be generated please post that