x86 English Windows XP Professional SP3 Product Keys:
RHKG3-8YW4W-4RHJG-83M4Y-7X9GW
B2RBK-7KPT9-4JP6X-QQFWM-PJD6G
VCFQD-V9FX9-46WVH-K3CD4-4J3JM
B66VY-4D94T-TPPD4-43F72-8X4FY
MRX3F-47B9T-2487J-KWKMF-RPWBY
B2RBK-7KPT9-4JP6X-QQFWM-PJD6G

  x64 English Windows XP Home SP2:
* VCFQD-V9FX9-46WVH-K3CD4-4J3JM

  x64 English Windows XP Pro:
* F4G2M-BH2JF-GTGJW-W82HY-VMRRQ 
  
  Windows Tablet PC Edition 2005 SP3:
* KY6GY-YHDPV-RMY9G-PHG6P-2F9Y3
you WILL need this product key to get the Tablet PC programs.

  Windows Fundementals for Legacy PC's:
* JWTG2-3CB49-QKWCW-R9DW9-MCJMQ

  x86 English Windows Longhorn Build 4093:
TCP8W-T8PQJ-WWRRH-QH76C-99FBW

  x64 English Windows Vista Ultimate SP2:
VMCB9-FDRV6-6CDQM-RV23K-RP8F7
* CDWBT-51A5L-WTCK2-4AJTI-4FY7G
* ZKWZZ-6OY5Q-92PI5-FHXH4-XQEE7
* J936I-IGS2B-AEXGA-FU0KZ-KU7BM
* 8A03P-ZC1UC-R02NE-GNL0T-FJKV0
* D59UX-QRMPC-7GUFO-KGJO5-RWB16
* Y5KBZ-Q3HY7-F4WZG-SRZYP-S1BT0
* G1PZO-641LP-QALQY-9M4YF-O4SYJ
* 8ZI67-LI0QP-5D750-OI0NH-ITRT8

  If you can't find a product key for Windows Vista/7/8.x/10/11, follow these steps:
1. Open command prompt as administrator
2. Type slmgr -rearm into the command prompt and press enter
3. Wait for the restart pop-up to appear
4. Restart your computer
5. Check activation status
  Any key with a * before it has not been verified to work.