Hi,
I have the same problem (case opened for this problem). Computers who's upgraded on MR4 MP2 is viewed on manager "status offline" and the client don't updaqte definitions and smc.exe use 50% of cpu.
When uninstall Mr4 MP2 and run cleanwipe and installer mr3 there is no problem. after i i try to upgrade on the same computer to mr4 mp2 by manager the computer as the same problem.
Another issue what i see, when you upgrade from mr3 to mr4 mp2, some computers lose ip configuration (ipconfig /all is blank in command line) and tefeer2 driver have a problem.
For the moment, i blocked the migration to mr4 mp2.
I have sended logs of computers, log of sylink (there is an error http 468), logs of sep support tools....
Have you any ideas for this problem ?