That system supports a maximum of 2GB of RAM, while you have 512MB installed.
A system that has few programs running...can exist and run well on 512MB of RAM and use XP. As the user begins to install more programs, which use up more system resources...the initial installed RAM may prove to be inadequate for efficient use of the system.
So the first thing I would suggest is...uninstall any programs which you don't really use.
The next thing I suggest...take a look at the programs you actually do use...and eliminate those which are not truly necessary...because you don't have the resources to support such. My favorite candidates for elimination include programs like MS Office, iTunes, Adobe anything, Real Player, Symantec anything, etc.
Looking at the software which originally came on that system, http://h10025.www1.hp.com/ewfrf/wc/documen...product=3245048
, I would have uninstalled most of those applications as soon as I booted my system initially.
Lastly...check your virtual memory settings for XP.http://www.ehow.com/how_5006028_check-virtual-memory.html
Ensure that there are no maximum/minimum amounts and that XP is managing your virtual memory.
As an alternative to the suggestions above...you could always increase the RAM installed in the system.