Windows Logo testing Warning for my driver

Originally Posted by Baxter

This should fix this annoying problem..

Go to Control panel > system > hardware, and select Driver signing. Choose "Ignore"
Let me know if that fixed it.

Cheers
Baxter

Tnx for ur advice , sure it fix the problem (and i test it) . but i prefer not to change the user system setting . I tried some other ways too and one of them that properly solve my problem, was making a little modification in INF file . i had specified a "System Defined ClassGuid" for my driver and when i comment it in my INF file , installation works without any warning! (with system default setting)
I can't understand what's the benefits of the CAT file in driver package ?!

BestRegard