What a PITA!  Thanks CA for being completely useless during this debacle.  I couldn’t even find a response in any forums or, god forbid, a post on the CA site to help people with this.  Whatever!

Scenario :
You’ve applied some recent updates to Win 7 or Vista and, probably received a new data file from CA…

Symptom :
You reboot, attempt to login and receive an error message stating that AtBroker.exe and Explorer.exe can’t start…

Fix :
Option A
1) Boot into safe mode (esc and F8 before windows load)
2) Open CA
3) Exclude the file Windows\System32\shell32.exe from the ‘On-demand Scanner’ and ‘Real-time Scanner’
4) Re-Boot and all should be ‘okay’ with the world

Option B
1) Boot into safe mode (esc and F8 before windows load)
2) uninstall CA
3) Re-Boot and all should be ‘okay’ with the world
4) Go get another virus protection package