Windows product keys:

Windows 2000:
 SP4: DDTPV-TXMX7-BBGJ9-WGY8K-B9GHM
 Dutch: MKFTT-B889R-XXYGF-W63WP-8VDYT
 Advanced Server: WY6PG-M2YPT-KGT4H-CPY6T-GRDCY
 Pro: RBDC9-VTRC8-D7972-J97JY-PRVMG
 Server: H6TWQ-TQQM8-HXJYG-D69F7-R84VM

Windows 95:

 RTM:757-2573155
 875-7215850
 100-1208613
 95A 049-6301576

 OSR 1:
 
 757-2573155

 OSR 2: 

 24796-OEM-0014736-66386
 16595-OEM-0001695-96524

Windows 98 FE:

 FXJGV-V47K8-9TKJ3-4UVBT-CTCFW
 HH872-6RM2K-FPPWV-V9HDB-BK708

Windows 98 SE:

 RW9MG-QR4G3-2WRR9-TG7BH-33GXB
 RC7JH-VTKHG-RVKWJ-HBC3T-FWGBG

Windows ME:
 
 B88DH-VQ89B-G4WWK-DCBP2-7B7PW
 HBTD9-6P338-XT2MV-QBTTF-WPGGB

Windows NT Workstation 4.0: 
 
 09496-OEM-0009552-77303 
 30495-OEM-0006276-08164 
 20796-OEM-0013791-67471

 Beta Windows:
  
  Windows Neptune:
  
   W7XTC-2YWFB-K6BPT-GMHMV-B6FDY