If the Aero feature stops functioning after running a registry cleaner utility, here are a couple of things you can try to restore Aero's functionality:

A.  If the registry cleaner you ran has an "Undo" feature, use that to set your system back the way it was. Then, run the utility again being selective on what it is trying to delete.

B.  Try restoring your system files back to original, here's how:

1. Go to Start

2. In the Search field, type in cmd.exe

3. Right click the Run Command and select "Run as Administrator"

4. At the command prompt, type in: sfc /scannow

5. Press Enter

C. If neither of the above works, try running System Restore to restore your configuration to a time when Aero worked. Here's how:

1. Go to Start

2. In the Search field, type in: restore

3. Click System Restore at the top of the list

4. Select the option that will allow you to run System Restore to a previous date.