I'm getting ready to roll Nod32 out to a bunch of clients, and have some concerns about its "startup scan". Is it really worth the daily performance hit and user whining? For years I used Trend Micro's product and clients did not perform any sort of startup scanning; only real-time scanning. In all these years I've not had a single actual infection or outbreak. I'm considering modifying Nod32's startup scan to only check boot sector and operating memory. Thoughts?