Installation mode not working after last update V 3.10.102363.531

Since the last update when I select switch to Installation mode when installing new software nothing happens. The installation mode prompt comes up and I click OK but I still get 20 to 30 prompts which I have to OK when trying to install new programs. The only way I get get around it is to disconnect from the Internet and close CIS and install the software. Then add the new program to My Own Safe Files when I restart CIS.

Defence in safe mode
Vista Home Premium