You may have a revised version of this http://www.securelist.com/en/descriptions/old21782865
I assume that you removed or disabled any rogue startup entries UnHackMe found?
Be wary of PC Tools AV stuff, it flags a lot of false positives.
If your wlan.exe file is suspect, rename it to wlan.exe.old and copy a fresh version off the OS installation CD.
Check your startup registry keys, listings under msconfig and services.
Without any browser windows open, do a netstat -ano from the command line and look for any outgoing connections to foreign servers and note the Process ID (it will probably be 0 which indicates that scvhost is corrupt). If the PID is not 0 trace the executable calling the process, rename the .exe file and replace it with a known good copy.
As I said, if this is an MBR rootkit/bootkit you will be better of scrubbing the drive and re-installing from scratch. You could be hunting this thing down until kingdom come and still never be able to remove it.