Has anyone deployed Symantec Antivirus Corp Edition v8.1?

We have semi deployed it to about a 1/4 of our systems.

We are starting to see a new problem that I'm curious if anyone else is noticing. Systems appear to be slow at initially opening objects.

ie. as an example, you go to right click on a file or object from within file explorer and the system may hang for maybe 10 seconds before the right click menu appears.

It is so intermittent that it is really hard to pin down what is causing it. There have been so many other Microsoft patches lately that it could be that, or maybe the new Symanctec Antivirus 8.1

Has anyone else been experiencing this "slow to respond" issue as well (with or without Symantec AV)