W7 routing - traffic not going to default gateway

This problem has repaired itself when the workstation in question acquired a new, different, IP address (I suspect the original lease expired).

Apart from a different IP address, the "ipconfig /allcompartments /all" output is identical, the "route print" is identical, and everything else I looked at was identical.

In retrospect I think something is faulty with the Windows 7 release & renew code where it does not actually seem to reset the TCP stack correctly or entirely. I have on other occasions noted that if you bring up a new DHCP server on a Windows network then the workstations seem to stick to the original DHCP server and do not do a full search, ie, first finding who the DHCP server on the network currently is.

If I come across a similar situation in future I'll try fiddling with DHCP first.

If you're struggling with the same, maybe check the lease time and then change the date/time into the future so that the workstation expires the lease? Alternatively you might be able to expire the lease from the server?

Kindly add an answer here if you find a good working method.