try this
(i reccomend you get hijack this! before going through these steps)
1.. boot into safe mode (if its xp/2k, hit f8 during the boot process)
2.. go: start ->run-> regedit and hit enter
3 go to hkey_local_machine\software\microsoft\windows\current version\run
4. right click on wintools and delete the entry.
run hijack this, and look for the following entries:
o2 - bho: (no name) {8776247-311c-43b4-8499-3d5fec94a183} c :\progra~1\common~1\Wintools\Wtoolsb.dll
o2 - bho :(no name) {63b78bc1-a711-4d46-ad2f-c581ac420d41}c :\progra~1\common~1\Wintools\Wtoolsb.dll
after you remove those....
open up my computer.. and go to c:\program files\common tools\wintools and delete the folder
reboot your machine to regular mode, and verify the folder was deleted
good luck
zero-d