Clock Freezes in Windows 7

Hi,
I have two computers which I upgraded to Windows 7. Both now have what I call clock freezes. When I click on the clock it does upgrade the time. Any ideas?
Thanks, Jim

Are you saying that the System Tray clock is not staying updated with the time via the internet?

It that's the problem do this: Left Click on the time in the System Tray, then Left Click on Change Time and Date Settings, in the pop-up window select the Internet Time tab, then click on the Change Settings bar, in the Server bar select "time-a.nist.gov" or one of the other servers with the DOT gov on them.

These are directly linked to the atomic clocks at the National Bureau of Standards.

They work better than the windows time server.