I have noticed that many operations take substantially longer when virus checking is enabled. For example,
Dragging a 1 meg zip file from a folder on my disk to an email attachment takes 30 seconds but under 1 second with checking off.
Building a zip file from 10 megs worth of files takes over a minute but only 10 secs with it off.
Microsoft Word comes up in about 1/4 the time.
Opening folders in windows explorer have noticable sluggishness but instantaneous with virus check off.
I did not compare browser functions because of the danger of being unprotected on the internet.
I understand that it was to do more work when virus check is on but it didn't seem to be this noticible in previous years (I've had this system since 2005).
I have XP with 3 gigs of RAM and a Pentimum duo running at over 2 Gighz
What version of security centre, Dat and Virusscan are you running? open task manager (ctl alt del) and see if any mcafee program using excessive cpu or memory when these issues occur.
I had just redownloaded everything on Monday because I was one of the folks who lost internet access after that weekend update.
Security Center version 11.0 build 11.0.679 lastupdate: 8/25/2012
Virus scan version 15.0 build 15.0.302 Lastu update 8/29/2012 DAT version 6818 DAT creation date 8/28/2012
Boot DATA version 6802 0000 Boot DAT creation date 8/13/2012
Engine Version 5400.1158
Starting with a quiet system (2% cpu) when I drag the zip file into email, it is mcshield that starts running up the CPU, at 50% (this is a dual thread CPU, so 50% is max a single threaded process can do).
In the mean time, is there a way for it to check files that are being created from the browser but not from my backup program, which needs to create humonous tempfiles (dramatically slower with virus check on)?