As everyone probably already knows by now there’s a problem with 3.5 U2.  VMware is working on a patch as we speak. There has been a KB article released, but it seems like everyone is clicking on the same link at the same moment cause it’s hard to get a decent respond.

The error message that appears:

This product has expired. Be sure that your host machine’s date and time are set correctly.
There is a more recent version available at the VMware web site: http://www.vmware.com/info?id=4.
————–
Module License Power on failed

In short, the workaround is simple just set the date back and you will be able to power on the VM’s again, it would be smart to set the time to correct value again as soon as you started the VM. As soon as I know more about the new 3.5 U2 update I’ll let you guys know!

And a nice work around from the VMTN forum:

Find the host where a VM is located
run ‘ vmware-cmd -l ‘ to list the vms.
issue the commands:
service ntpd stop
date -s 08/01/2008
vmware-cmd /vmfs/volumes/vm path/vmname.vmx start
service ntpd start