Straight from NAI's KnowledgeBase:
Install Service Pack 1 for McAfee NetShield 4.5 and apply the HotFix Rollup (HFR).
Both Service Pack 1 (SP1) and the HotFix Rollup (HFR) can be downloaded by visiting
and choose Product Upgrades. After entering your Grant Number,
click on the NetShield link to view the available files.
NOTE: You may have to choose a product suite, such as Active Virus Defense or Total Virus Defense, before seeing the product specific links.
Once the Service Pack is installed, you can adjust the timeout length. In the On-Access scanner properties, under the 'Advanced' tab, increase the number value present in the Compressed Files section. This will allow more time for scans to complete.
There are two timeout settings, one for archive files (.ZIP files) and a general purpose one that applies to any scan operation. You will only be able to set the increase the compressed file timeout number to one second lower than the
general timeout value.
HTH,
AVChap
... my $1 worth of advise, 2cents isn't enough due to inflation