A few days ago, the re-release of FFVII was up on the store by mistake and hapless me happened upon it by fluke. There's another thread here about it, but long story short the serial didn't work, I was refunded, and I uninstalled the game.
Ever since uninstalling, I've seen strange system behavior. The system sound for device disconnected keeps playing.
I tracked down the source to services starting and stopping. These services are all related to error reporting and user experience services. I've seen problems out of Application Experience, which is related to aitagent.exe. This service randomly starts and stops at time when it is not scheduled, and would not cease until I disabled it. Problem Reports and Solutions Control Panel Support started doing the same thing immediately after.
My system is also hanging intermitently, which has not happened ever in three years since I built it. This is not due to a sudden performance demand.
The SecuRom software has something nasty in it that does not go away on uninstal. I'm not sure how it works yet because it is not detectable like a standard rootkit. This software also interferes with the operation of AdAware by preventing its GUI classes from executing. The task manager shows the process, but nothing else happens except when the application is launched by context menu.
This is just a heads up to others out there.