right mouse button after SP2 install

It may be a coincidence but since installing SP2 when I right click on a
icon on the desktop to check properties I get the hourglass and nothing
happens. The same for icons in the task bar although the start-up group to
the far right are okay. I have seen a reference to this elsewhere and would
appreciate any info to correct this problem with my right mouse button functionality
regards
Fred Pickering
new email fredp56@tpg.com.au