This is an updated guide as I found recently ( Mar 2012 ) that malware bytes failed to recover a customers UKASH infected machine.
The UKash virus pretends to be a punative police notice. That demand the payment of a penalty.
MalwareBytes - This no longer works
Stage 1 - Collect Virus Removal Tools on an uninfected PC and put on a USB/CD
Stage 2 - Start the infected PC in safe mode.
Restart the infected PC and press F8 during boot. Then choose Safe Mode with networking.
Stage 4 - Remove all components of the virus
Inser the USB/CD and run Kaspersky Virus Removal Tool . This will remove all the active components of the virus
Stage 5 - Restart PC
Restart the PC and start in Normal Mode. Your machine should now run. A cmd box will open as Kaspersky Virus Removal Tool attempts to remove all traces of the virus.
Just to be safe check that your virus software is enabled, force it to update and run a full scan.