Your OS seems to be doing fine. 384MB of RAM should be adequate for Spybot-SD to run... so RAM shouldn't be a problem.

Is AdAware a paid subscription?

Alright. Download a fresh copy of Spybot-SD. Then attempt to install it and run it.

I'm seeing if reinstalling might help since AdAware is off.

I would suggest removing BAZOOKA, because it's database is badly outdated.

In your post on June 13, you asked about whether the programs are rouge or legit. Well, all of them are legit, so there's nothing to worry about.