Look for a registry entry at HKCU\Software\Microsoft\Windows\CurrentVersion\Run\OLE
and delete it if it exists. This should stop it running on a reboot.
System restore to a point in time before the infection can sometimes be very effective (unless it’s infected those too).
Other than that, as said, Malwarebytes is your first line of defence. Save the log it creates.
Look for krk.txt in your Windows folder. Assume that any text contained within is in the hands of the author and act accordingly with regards to passwords and bank accounts.
Assuming you’ve removed it, you may need to reset your browser to remove proxy settings and home page redirects. Exact instructions vary by browser. IE: http://support.microsoft.com/kb/923737