Run
HijackThis , select to do a "system scan only" and then place a check beside each of the following:
O2 - BHO: (no name) - {B9F71C20-549C-415B-8904-43FFCADCF6CE} - C:\WINDOWS\System32\jkkjg.dll (file missing)
O20 - Winlogon Notify: jkkjg - C:\WINDOWS\System32\jkkjg.dll (file missing)
O20 - Winlogon Notify: pmnlkif - pmnlkif.dll (file missing)
Now first close all windows and browsers other than HiJackThis , then click
fix checked and close HijackThis.
Reboot youre pc , and post a new
hjt log please. (by attaching it to a post)