Generic product keys
Product Name    Product Key
Windows XP Professional (32-bit)    MVF4D-W774K-MC4VM-QY6XY-R38TB
Windows XP Professional (64-bit)    FM634-HJ3QK-6QVTY-RJY4R-XCR9J
Windows XP Tablet PC Edition    XT67V-GY7FW-GR6FR-WDK2C-8T97J
Windows Server 2003 R2 Standard Edition x86 PWBJC-22697-D4CVH-FCJWW-DTF9J
Windows Server 2003 R2 Standard Edition x64 XCP6P-7WVXP-F8FQ4-JV6CD-6XV28
Windows Server 2003 R2 Enterprise Edition x86   XHPV3-PTCWJ-7Y94F-Q6BVH-J849J
Windows Server 2003 R2 Enterprise Edition x64   WQ3GW-Y8GQW-8VJYB-JYM43-D24C8
Windows Server 2003 R2 Datacenter Edition x86   FXYF6-VTXGX-3JPX9-HJ9K4-6TKTW
Windows Server 2003 R2 Datacenter Edition x64   KDX8X-FYW4T-C6D9J-BKM6M-M89TW
Windows Server 2003 R2 Web Edition x86  GM8KD-GB7JY-QGQYP-XRV74-RT728
Windows 8   46V6N-VCBYR-KT9KT-6Y4YF-QGJYH
Windows 8 Professional  V7C3N-3W6CM-PDKR2-KW8DQ-RJMRD
Windows 8 N 7QNT4-HJDDR-T672J-FBFP4-2J8X9
Windows 8 Professional N    4NX4X-C98R3-KBR22-MGBWC-D667X
Windows 8 Single Language (Emerging Markets)    NH7GX-2BPDT-FDPBD-WD893-RJMQ4
Windows 10 Home 46J3N-RY6B3-BJFDY-VBFT9-V22HG
Windows 10 Home N   PGGM7-N77TC-KVR98-D82KJ-DGPHV
Windows 10 Pro  RHGJR-N7FVY-Q3B8F-KBQ6V-46YP4
Windows 10 Pro N    RHGJR-N7FVY-Q3B8F-KBQ6V-46YP4
Windows 10 SL   GH37Y-TNG7X-PP2TK-CMRMT-D3WV4
Windows 10 CHN SL   68WP7-N2JMW-B676K-WR24Q-9D7YC
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https://en.wikipedia.org/wiki/System_Locked_Pre-installation