Hello,
What version of SEPM are you carrying?
A quick observation shows that its windows 7 and SEPM console, is that the Java SEPM console?
Perform a repair install on the local management console.
If that does not help, Perform an uninstall of the Java remote console and reinstall and change the sesm.xml file to location counting being false per the directions in this doc as below:
Title: 'Symantec Endpoint Protection Manager is slow to respond with large numbers of groups in the environment'
Document ID: 2008052709295248
> Web URL: http://service1.symantec.com/support/ent-security.nsf/docid/2008052709295248?Open&seg=ent
OR
if Possible upgrade the SEPM to the latest version.