The reason all items I noted were not in the latest HJT log is because you uninstalled them, that is what is supposed to happen.
Now for memory and hard drive size;
You stated the RAM at 768...I am assuming this is 768MB, not very much.
You don't have enough RAM installed really for the computer to run quickly. Usually running out of virtual memory means that you are running to many programs at the same time for your system or one of them is attempting to use too much memory. I think that TOO many programs running at once and your small amount of RAM are the main reasons for your problems.

I would recommend that you purchase additional RAM which is not very expensive and easy to install. Go to Crucial and their page will do a scan of your computer and give recommendations for how much additional RAM you can install. Their prices are very reasonable.

The operating system tracks the programs running and how much memory is needed to run each one. Some take more than others. If you are working with photos, videos, music or a large word document that will take more memory than others so the operating system ends up taking from one running program and giving it to another. If you have too many running or too many large programs running then this will slow things down because the os will have to keep swapping the memory back and forth. Plus remember the operating system uses memory itself, typically XP needs 128MB to run and that is the minimal recommended amount which, in reality is barely enough. Take that 128MB from what you have installed and you probably only have about 640MB to work with everything else.
You also have your virtual memory size set too low. The default and recommended size of this file is 1.5 times the amount of physical memory. So yours should be set at 1152MB not 768.
I also don't know what type of video card you have in the machine but it also uses some of the RAM usually, which lessens the amount you have available for other uses.

To control auto starts I would recommend that you download and install CodeStuff Starter
Now, yes, you can do this using msconfig, though I was taught this should be used for troubleshooting only but it can be used. But I am recommending CodeStuff Starter for several reasons, it is EASY and Free, AND you also have the ability with this one program to control programs in Startup, Programs which start as Services AND also see processes running on the computer, like the task manager will show you. So you can do it all with one program at the same time. Download the program and save it to the desktop.
In my post above I gave a list of things that were auto starting which were not necessary and can easily be run manually when you need them. When these programs auto start they are running, even if you are not using them so you are using valuable resources needed to run a particular program you may be using at the time.
Here again are those, plus a few more and an explanation of each, auto starts which you can stop from running at start up when you use CodeStuff by just first clicking the Start up Tab and removing the checkmark next to the program, closing the program and then rebooting the computer.

PRONoMgr.exe>>>System Tray icon for Intel PRO series ethernet adapters giving access to the diagnostic features, not required to start automatically as you can run it when you need to.. It is advised that you disable this program so that it does not take up necessary resources.
IgfxTray>>>Quick access to the control panel via a System Tray icon for graphics based upon the Intel chipsets. not required to start automatically as you can run it when you need to.. It is advised that you disable this program so that it does not take up necessary resources.
AdaptecDirectCD>>>DirectCD primarily allows you to drag and drop files onto a suitably formatted CD-RW disc. not required to start automatically as you can run it when you need to.. It is advised that you disable this program so that it does not take up necessary resources
Microsoft Works Update Detection>>>Checks for updates to MS Works
MimBoot>>>Starts Musicmatch Jukebox at bootup - can be started manually
QuickTime Task>>>System Tray access to Apple's "Quick Time" viewer from version 5 onwards, not required to start automatically as you can run it when you need to.
MediaFace Integration>>> Neato™ cd label design software, not required to start automatically as you can run it when you need to.. It is advised that you disable this program so that it does not take up necessary resources.
ISUSPM Startup>>>InstallShield Update Service Scheduler. Automatically searches for and performs any updates to the software, not required to start automatically as you can run it when you need to. It is advised that you disable this program so that it does not take up necessary resources.
ISUSScheduler>>>InstallShield Update Service Scheduler. Automatically searches for and performs any updates to the software, not required to start automatically as you can run it when you need to. It is advised that you disable this program so that it does not take up necessary resources.
NBKeyScan>>> part of Nero 8 BackItUp utility, a specialized part of versions of BackItUp optimized to function with external drives that support a one-step-backup type function.
NeroFilterCheck>>>Associated with "Nero Burning Rom" CD writing software. Checks for driver issues but not required for the running of the computer.
ISTray>>>Related to Spyware_Doctor from PC Tools
SunJavaUpdateSched>>>SunJava update scheduler. Can be run manually
Corel Photo Downloader>>>Related to Corel Photo Album. Not required to start automatically as you can run it when you need to. It is advised that you disable this program so that it does not take up necessary resources.
MoneyAgent>>>Part of MS Money. Available via Start -> Programs
BgMonitor_>>>related to Nero Home CD burning software.
Pando>>>allows you to send large media files to specific recipients.
Yahoo! Pager>>>Yahoo! Messenger allows you to send instant messages. Available via Start -> Programs
WinZip Quick Pick.lnk>>>Pick taskbar icon that gives you instant access to WinZip and recently used ZIP files.
Here are the services you can disable using the Services Tab in CodeStuff:
PrismXL>>>The PrismXL service lets the Client deploy Tasks on a target computer regardless of the current user.s permissions.
ProtexisLicensing>>>Part of the Protexis copy protection and license management software. This will typically be installed by other software that uses this to protect itself from being illegally copied.
LiveShare P2P Server 9>>>This will use a lot of resources PLUS with the two files noted above it appears you are doing P2P file sharing. Even though with those above you are at least attempting to "stay legal" and not take copywrited material this still is a risky thing to do, many times you end up sharing a lot more than you bargained for. I would really "rethink" this activity.
Take the checkmarks out of all of the above with CodeStuff Starter. Close the program and reboot the computer.
Also remember, all of the items noted above can be run manually when you need them BUT remember to Close them when you are finished using them so that the memory is released back into the system. Don't let something you are no longer using keep running because even if you are not working with it if it is open then it is using memory. So close them down when you are finished.
Judy