Upgrading Window2000 from Win95 / 98 / NT.

In some cases it may happen that ProductID number is loast. Then if you are upgrading to WIN2000, the installation always abore on a message like "Can't find upgradable windowsOS " or some thing similar.

Here is the proceedure:

1. Find in your papers your serial number, written on OS Licence.

2. under win edit the REGISTER. (Run REGEDIT) and find:
	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
	
3. Complet the "ProductId" field with your ID Number, exit and run WIN2000 install. It should work.