I installed the 11.10 update this week and my Windows Experience Index score for desktop performance for Aero features plummeted from 5.9 to 5.1, although my score for gaming graphics stayed the same at 6.6. I've had this computer for 2 years and installed every update and this has never happened before. No previous update has caused any change in the Experience Score until now. I rolled back to 11.9 and re-ran the assessment and the score went back to 5.9.It seems puzzling that only the Aero performance score has changed while the gaming graphics score is fine. I also found that when I uninstalled 11.10 in order to roll back the uninstaller stalled while uninstalling CCC. I am running Win 7 Home Premium(x64) with a mobility Radeon HD 4650. I would really appreciate it if someone could explain what the problem might be.Thanks in advance.