Sounds like something is hogging resources, could be
What do you have "starting up" in your system. If you
have loads of programs that offer "quick start" features
this can hog resources. I have few programs start up with
Run msconfig, click "startup" and get rid of programs that
dont need to boot with the OS. DO NOT UNCHECK ANYTHING
YOU ARE NOT FAMILIAR WITH. WARNING---WARNING
I unchecked quicktime, adobe, realplayer, etc. I can wait the
extra few seconds for the program to load.
CTR-ALT-DEL, "task manager" and look under "processes" and
"CPU" to see what might be hogging resources-"mem usage".
You probably dont need all the services XP has "enabled."
Become familiar with the unneeded services and disable them.
is a good place to get the skinny on XP
Like the others have said, check for viruses, bad ram, cpu
running hot. Problems with your power supply in the case.
The key here is to begin to "ELIMINATE' things one by one.
In my opinion, get rid of the unimportant stuff thats loads
in the tray, again, the quick launch crap that win amp,
real player, IE, and every other program installs. It will
begin to add up. DONT REMOVE ANYTHING YOU ARE NOT
FAMILIAR WITH. I leave my virus program, and speaker icon
that is about it for me.