hi marks,
Download free from the web HijackThis.exe
If you do a scan with this program you may see the 'ASK' listed, if so delete it.
If that fails then go:
Start
Run
type in regedit
Use the search function to find each and every reference to 'ASK' and delete it.
Take care not to delete any words that 'ask' is just a part of.
ie: task
Do you use a firewall.? Zone Alarm is a freebie.
I guess you have tried using 'Add or Remove' to delete ASK, using the MS program.??