InstallerS Problem - Consuming All my RAM

Hello

I was wondering if anyone could help me out. I downloaded something the other day (I have since cleared all cookies and history so I don't remember were it was from) and tried to install it on my MAC. I'm not sure what happened to the install. I was being distracted by a few christmas activities at the time and wasn't paying a lot of attention to my computer. I though that install had completed as there was nothing happening on my computer when a got back to it.

Anyways...The problem is when I start up my MacBook Pro- OS X 10.6.8 - 4GB RAM it starts fine but then once up and running the computer slows down to almost freezing up. I did as much as I could with what I know with respect to erasing all histories/cookies from all web browsers, but it's not that. I was able to get to the Activity Monitor in my Utilities folder and found out that an 'InstallerS' was increasingly using up my RAM until all my available RAM was occupied. When I forced quite the Installer S, my Mac returns to normal. The other symptom is when I shut down my computer about 50% of the time a small window come up and asks me if I'd like to abort the install. This is sometimes after a long period of computer use and long after I have 'forced quit' the InstallerS.

I have looked in my 'Startup Folder' and there there is nothing there.

I have searched in my 'SpotLight' for InstallerS and have found nothing.

I have erased all cookies and history from all web browsers.

Please find attached an image of my activity monitor just as my RAM is being more and more consumed.

The first time I was able to get to my activity monitor I had 5 MB of RAM available. Only the InstallerS, Finder and Activity Monitor were running.

I would love to know how to ride my computer of this InstallerS issue once and for all.

Best regards,

B