Wanted, just to add my 2 cents...I'd suggest you can shut the following down to free up some resources.
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
(this is an obsolete file...a leftover from a deleted one.)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common
(Unless you are constantly using/reading PDF files, you really don't need this....some will say even if you are it's not needed.)
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
(another Adobe piece of bloatware that you can do without.)
O2 - BHO: AskBar BHO - {201f27d4-3704-41d6-89c1-aa35e39143ed} - C:\Program Files\AskBarDis\bar\bin\askBar.dll
(I personally HATE a lot of task bars, and especially this one. I would uninstall it. It usually gets sneakilly installed with something else.)
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: (no name) - {aac4043a-8832-4abe-9963-35377f30b8e6} - (no file)
O3 - Toolbar: (no name) - {07B18EA9-A523-4961-B6BB-170DE4475CCA} - (no file)
(more leftovers to delete)
The following load when you start your puter and are always running in the background.
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
(this is for RealPlayer, and isn't necessary)
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
(this is for Quicktime, and isn't necessary)
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
(Java runtime...no need for this, as you can update it yourself)
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Sparky\Local Settings\Application Data\Google\Update\GoogleUpdate.exe" /c
(this is just silly...even if you have GoogleEarth installed you can still update it yourself)
Here is the HijackThis Logfile anaysis site. Just copy your results and paste them in the box...it will show you what they are and you can better see whether to disable or delete some.
Logfile Analysis
The less you have running in the background, the more resources you free up. I have an old putersaurus (still has an agp card..LOL) and I can even run 2 instances of CoH at once.
I hope this helps some. Good luck!