MY COMPUTER LAGS BETWEEN CLICK WHEN SELECTING NEW PROGRAMS, OR WHEN ONLINE AND OPENING A NEW APPLICATION. THIS JUST STARTED A FEW WEEKS AGO, I USE AVG AND SPYBOT AND MY SYSTEM IS CLEAN. I DEFRAG REGULARLY, ANY SUGGESTIONS?
More granular information on the latency would be helpful. If the problem is in correlation to RAM/memory constraints, adding more ram and/or running "msconfig" and disabling unnecessary startup items and services should help.
It could be your memory, harddrive, or a new install/virus/spyware/software in general
Just a anti virus program is not going to stop everything. The reason you constantly have to update those security programs is because some dork is always making something different to spam the web with.