Posted 12 June 2009 - 06:47 PM
If the system was off for a while, Mcafee probably downloaded the virus database update files. It used to much processor time for the download process thus not allowing you to use the computer. The answer is in your setup. You may find that background apps have two much priority as compared to foreground apps.
right click computer, properties, system properties, advanced, performance opotions, advanced.
click on adjust for best performance of: Programs.
Also check to see how close to full your hard disk is. If it is near its limit, the page file and other windows apps may be having problems saving to disk. When windows starts, many temp files are written to disk. If there is no space, there will be a problem.
I have had problems where for some reason when Mcafee downloaded new virus data files, it did not delete the old files. These files stacked up until the hard disk was full, and caused the major slowdown.