Windows stuck applying updates if SEP 14 install pending reboot

Hello,

I recently deployed SEP 14 MP1 to install over SEP 12.7 on my fleet of 6500 PCs. I'm seeing multiple incidents coming in, where the following issues are occurring:

• Internet Access stops
• Internal websites are very slow
• SEP console does not open, but is in the task bar
• running SMC -stop does nothing

In all cases, Internal network resources (PING/File shares etc) are ok, and SEP 14 is pending a restart post install. Initiating a shutdown stalls at 15%, no matter how long you wait, and a hard reboot then completes windows updates and windows/SEP is now ok.

This is affecting less than 2% of machines so far, but enough number to be a concern. Any ideas?

Regards

Jason Reid