OK lets do the easy thing. Go to search type memory diagnostic.
That is the built in memory test, not as good, but I do not think that you have a memory problem. For now lets go with the results of that.
I will tell you what I would do if it were my computer
I would make a system restore point, first, so I could go back if I did not like the results http://www.vistax64.com/tutorials/76905-system-restore-how.html
I would uninstall the anti spy thing
I would uninstall my anti virus
Go to seach and type the name of your anti virus and uninstall tool. Use that to uninstall.
I would replace them with
Microsoft Security Essentials
and
Malwarebytes both free
I would then go back to task manger and see how much memory is being used.
Richc46 one thing that I could see in the task manager was that the firefox application was using a lot of memory. Lets try not to use it for a while and use a different browser such as chrome or Avant.
Okay here is the deal I uninstalled my Superanti Spyware on both computers. On my xp it uninstalled right away on my Vista it is taking for ever. How else can we uninstall it? For whatever reason the uninstall tool will not appear.