Hello and welcome to the Windows 7 Forums
Have you tried running CS3 as an administrator?
That may solve the problem, though it's just a thought off the top of my head.
I had another separate thought, so I figured it best for a new post:
Have a look at the gadgets you're running. If any periodically update from the web and are poorly written, I can see it/them being able to do something like you're complaining of.
In my more recent tweaks and changes, I chose to use the weather gadget included with Windows, instead of a 3rd party one.
Good point about the gadgets. I disabled them as soon as I installed windows.
This might help you figure out what service is the cause:
advapi failed login locking account
I know that HIS problem is the opposite, that the Advapi CAN'T log on, but look down at the first reply. It gives helpful links that will help you understand what it is and then maybe you can find it and deal with it properly.
I would also advise that you run HijackThis but you should only do this if you have some above average computer skills. If not, just ask for help here.