I am struggling with a similar problem on a recent install of Windows 7 Enterprise. It is not syncing with internet time- in fact, there isn't even a tab for that on the time/date program. The clock has the correct time when it boots up, but then just
hangs there.
I tried your command prompt time restart (as administrator), and got an 'access is denied (0x80070005) error when I did the 'unregister' step. It appeared to reregister wen I did that step, but when I did the resync step, it said, "the computer did not resync
because no time data was available." Strangely enough the taskbar time changed to the correct current time, but the clock continues to 'hang'.
Querying "time" on the command prompt gave me the same incorrect time as that on the taskbar.
I'm about to rip it back down to the bare metal and reinstall it- between the stalled clock and the nearly un-useable keyboard (it also hangs when I type at speed), I've about had it. My workplace is upgrading from XP to Win7, and I'm one of the test subjects
in the IT department. If I can't get it to work right, how can I fix it in other upgraded machines?