I have since found an easier way to solve this prob...read the following excerpt from my blog...
Hi All, FYI and future reference
When trying to login to Windows and you receive the error The current time on this computer and the current time on the network are different. For more information about Date/Time Properties, see Help and Support. To log on, contact your system administrator.
The problem is that somehow the system time/date has been changed (probably from the time/date control found in the Windows tray in bottom right corner) and then logged off or who knows
none the less
Get the user to
unplug their network cable and then log into the system!
They will then be logged in with cached credentials.
Once logged in, plug the cable back in, and get them to restart the pc.
This should reset the time.
If this fails - repeat the process again - but this time get them to change the date to the current date when logged in and before the cable is plugged in.
If this method fails on both counts...do the following at own risk (not much risk if you know the BIOS - but don't change anything but that which I mention or risk losing your setup)....
The solution is to reboot the machine and enter the system setup (aka BIOS) by pressing the key appropriate to your machine e.g. F1, F2, DEL, etc. when the PC is first started.
From here you should be able to change the DATE to "todays" date.
Be aware that some BIOS's use the US date format MM/DD/YYYY.
Follow the instructions in or around the BIOS environment on how to navigate around and then change the date.
When that's done save and exit (choose yes).
The system will reboot and the you should be able to login to Windows successfully.
Hope this helps...