My bad - that particular KB is only for IE6, and you have IE7 so you're okay. I missed that little detail. You're already patched.
Download CWShredder
Download
CWShredder and run it. Click Check for Update. Click on 'I Agree' button if you agree. Click on 'Fix' (it will automatically fix anything it finds for you) and then click OK. If it asks if you want to delete a certain random file, choose No and post that filename here. Let it finish the scan and then hit Next and Exit.
That should find any remaining CoolWeb/WebCoolSearch.