Hi EricJH and Bad Frogger
Try deleting the rule you made for explorer.exe. Go to Defense + --> Advanced --> Computer Security Policy --> look up the rule for explorer.exe and remove it --> Apply and Ok your way out. Now try again.
this solution doesn't work ... sorry

nevertheless thanks for your help

but this of the other thread
Go to C:\Program files\Comodo\Comodo internet security\scanners and rename the file bases.cav
to oldbases.cav
Then go into the folder C:\Program files\Comodo\Comodo internet security\repair and copy the file
bases.cav from there to the scanners folder.
works fine
i thank you very very much for your help

but i don't understand the correlation of this file and the freez of my Vista.
could you eplain this for me
