TMG stops passing traffic after windows update

Hello,

Have a TMGSP2RU3 running on 2008R2SP1 in a VM with dynamic memory on a Hyper-V 2008R2 server and no VMQ's.
After installing these updates TMG stops passing traffic after an unspecific amount of time, typically an hour or two.

Uninstalling these updates brings everything back to normal. This installation has worked flawlessly for years.

Any suggestion what update is causing this? Any recommended action?

This is a production environment and I have had no time to investigate yet.

Regards,

Henning

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