[Verona] 8u75 cannot be uninstalled after installed 9+101

1. Install 8u75 b03
2. Install 9+101
3. Uninstall 8u75 from control panel

Expected:
8u75 can be unisntalled
Actual:
Uninstalling is hanging for a long time and cannnot complete and exit successfully.

This problem blocks many AU tests.