Hi @Anonymous
At first I would suggest that you follow the instructions mentioned here.
If the issue persists, please check the below:
1. Is the extension installed in multiple Chrome profiles on the same machine? If yes, then delete from the rest of the profiles and install only on the one you intend to use
2. If any of the below processes is running in the background, stop them as they may interfere with the addon:
- Google Chrome Installer
- Google Crash Handler
- Google Installer
3. Run PAD as admin and check if the issue persists
4. Go to %localappdata%\Google\Chrome\User Data\Default\Preferences and set the "exit_type" parameter to "normal"
5. Make sure that the environmental variable "ComSpec" with value "C:\WINDOWS\system32\cmd.exe" exists on the machine