To see all sorts of data about your system...Start/Run...type msinfo32 and hit Enter.
Total Physical Memory is listed in the right screen, last item viewable without scrolling.
<<I've always had problems with this computer, have rebooted the whole system about ten times, and for some reason I keep getting viruses.>>
IMO, users who have continual problems with malware...do so because they don't care about properly protecting the system, their data, etc. Which is the right of every computer user...but it creates problems when you want to enjoy your system or use it productively.
Soooo...my question is...do you want to invest some time into properly maintaining your system...or do you just want a quick fix? If you've reinstalled XP 10 times over a 2-year period...it would seem that you prefer the quick fix (which is only temporary).
Do you do any maintenance on this computer? Have you run chkdsk on it recently?http://vlaurie.com/computers2/Articles/chkdsk.htm
Try running chkdsk, according to the directions provided for using the Graphical Interface. When presented with the screen providing the two options (Automatically fix/Scan for)...put check marks in both...ignore that comment about chkdsk taking many hours.
After you click the Start button, a new window will open, informing you that chkdsk cannot be run now (routine message) and asking if you want it to run at next boot. Type Y in response, hit Enter. Reboot the system and the command will run. When it is finished, it will boot into XP automatically.
What antivirus program is installed? Is it updated properly? Do you have Malwarebyes and SUPERAntiSpyware installed and updated?
Are you using the XP firewall or another?
You may need this someday, http://h10025.www1.hp.com/ewfrf/wc/manualC...=reg_R1002_USEN
A tip of the hat, you are one of the few persons with a large hard drive...who has not made the entire drive the C: partition
. That's good!!