If Windows is now running, rightclick My Computer, Properties,
General. The product ID appears under your name in the section titled
“Registered to:”.

If you cannot access the current product ID, try making up a product
ID!  The secret is that when you add up all the digits in the second
numeric field, the total must be an even multiple of seven.

Examples:

17177-OEM-1616167-16167
10597-OEM-0021407-56804
30397-OEM-0026382-89293
12697-OEM-0022316-53361

1+6+1+6+1+6+7 = 28 which is 4*7
2+1+4+7 = 14, which is 2*7
2+6+3+8+2 = 21, which is 3*7
2+2+3+1+6 = 14, which is 2*7

Bill Starbuck (MVP)