If Windows NT 4.0 is obsolete, who needs the OEM Product ID? Surprisingly, several communities still require it:
Have a specific question about recovering your OEM Product ID from a dead hard drive or an old IBM ThinkPad? Consult a professional data recovery service that handles vintage file systems – your PID may be sitting in a registry hive waiting to be extracted. windows nt 4.0 product id oem
For industrial engineers keeping critical machinery alive, treat that OEM Product ID like gold. Back it up, document it, and consider migrating off NT 4.0 before 2030, when even emulation may no longer support its ancient protocols. If Windows NT 4
If you have an existing NT 4.0 machine but lost the COA sticker, you can recover the Product ID (which can sometimes be converted back to the Product Key). If Windows NT 4.0 is obsolete