Although Microsoft does not support Windows XP updates any more, I'm sure there are still many users using it due to their personal habits or job demands. Therefore, XP's product keys may be necessary even now. Here lies the most comprehensive list of Windows XP product keys.

The following CD keys are official and original from Microsoft, mainly used for Windows XP Professional Service Pack 2/3 VOL/VLK system images, which are the easiest ones to find on the Internet.

Windows XP Professional 32-bit Edition

SP3 VOL

M6TF9-8XQ2M-YQK9F-7TBB2-XGG88

MRX3F-47B9T-2487J-KWKMF-RPWBY

QC986-27D34-6M3TY-JJXP9-TBGMD

• CM3HY-26VYW-6JRYC-X66GX-JVY2D
• DP7CM-PD6MC-6BKXT-M8JJ6-RPXGJ
• F4297-RCWJP-P482C-YY23Y-XH8W3
• HH7VV-6P3G9-82TWK-QKJJ3-MXR96
• HCQ9D-TVCWX-X9QRG-J4B2Y-GR2TT
• K2CXT-C6TPX-WCXDP-RMHWT-V4TDT
• QHYXK-JCJRX-XXY8Y-2KX2X-CCXGD
• MFBF7-2CK8B-93MDB-8MR7T-4QRCQ
• 2QQ6J-HGXY3-VGH23-HYQDC-BYR2D
• CM3HY-26VYW-6JRYC-X66GX-JVY2D
• T72KM-6GWBP-GX7TD-CXFT2-7WT2B

SP3 VLK

TQMCY-42MBK-3R4YG-478KD-7FY3M

• DG8FV-B9TKY-FRT9J-6CRCC-XPQ4G
• RFYPJ-BKXH2-26FWP-WB6MT-CYH2Y
• 7HPVP-8VHPV-G7CQ3-BTK2R-TDRF3
• DG8FV-B9TKY-FRT9J-6CRCC-XPQ4G
• CXGDD-GP2B2-RKWWD-HG3HY-VDJ7J
• RK7J8-2PGYQ-P47VV-V6PMB-F6XPQ
• T44H2-BM3G7-J4CQR-MPDRM-BWFWM
• XW6Q2-MP4HK-GXFK3-KPGG4-GM36T

SP3 VOL MSDN

MRX3F-47B9T-2487J-KWKMF-RPWBY

SP3 HP

P2BXT-D7Y8P-F6WF2-HYXY9-49TJD

SP3 OEM SONY

K7RGC-CDXYJ-FTYH2-Y3VVV-KBYC7

SP3 IBM

TW8WB-MKT89-FRD3V-H6CGJ-6JW83

ACER

KDD3G-HGVGM-M24P4-6BMMY-9XHF8

DELL

KG7G9-67KHV-4FQKV-4DYXK-BHQTJ

LENOVO

VF4HT-MPWB8-TWV6R-K6QM4-W6JCM

SP3 OEM THTF

M68XC-TX2C9-PKK8H-GP8JH-RC8XB

SP3 OEM COMPAQ

KYKVX-86GQG-2MDY9-F6J9M-K42BQ

FUJITSU OEM

C873T-F3X3M-9F6TR-J26GM-YTKKD

Pro SP3 OEM FOUNDER

F4G2M-BH2JF-GTGJW-W82HY-VMRRQ

Home SP3 OEM FOUNDER

K72PX-D96QW-RCHB9-3P96F-YQBCY

Home OEM Haier

GYFDM-KCXHW-6GFGQ-JQ9FH-B4TRY

SP2 OEM HP

P2BXT-D7Y8P-F6WF2-HYXYP-49TJD

Home OEM

JQ4T4-8VM63-6WFBK-KTT29-V8966

Home Retail

RH6M6-7PPK4-YR86H-YFFFX-PW8M8

Media Center

• C4BH3-P4J7W-9MT6X-PGKC8-J4JTM
• B2Y39-43MG6-MMGRG-7VKCF-VXMCM

Professional Corp

XP8BF-F8HPF-PY6BX-K24PJ-TWT6M

Professional OEM

• XJM6Q-BQ8HW-T6DFB-Y934T-YD4YT
• WRKF9-4FQ88-XTQYB-8KV6J-7TJR8

Professional Retail

CD87T-HFP4C-V7X7H-8VY68-W7D7M

Professional SP2 VOL

CCMWP-99T99-KCY96-FGKBW-F9WJT

Plus

DMC3M-2PD9R-9F8RY-KCKYC-JPXWM

Windows Server 2003 VOL

KJTHV-V4BVY-6R9JK-YJM7X-X7FDY

Office 2003 VOL

GWH28-DGCMP-P6RC4-6J4MT-3HFDY

SP3

• V2C47-MK7JD-3R89F-D2KXW-VPK3J
• T7C4Q-47VGM-R7J6B-VPJ84-JPJ93
• FY32F-XF3B6-277BF-YWBQF-GVRX3
• XBC76-H7RCG-KQPKH-QK8PT-7D789
• VQP4F-V47P8-BBDXK-R7K9Q-B42BB
• TBHJK-W4DPH-9D267-H93VR-WMXQJ
• JBH94-K6WKQ-YHTD6-XJFV9-WJP7Y
• C626F-H4CCJ-PWR8R-2RB9K-3G3HD
• HRCXT-BY6WB-VBM83-CMBXF-BVWYY
• W733W-GWPGB-37X4T-BRD7P-JVT2D
• VHBCM-H2YTW-TCYRR-QFTV6-XQQBG
• XGVKJ-C8FB2-9GXXF-7DTG4-RYXFB
• BMR29-HX9Y6-X6GTX-GKGGX-K8VV6
• RHGJC-9CPJC-8M8F6-KYXCP-FRGC6
• J3GMD-RMM3Q-HKC62-TV8Y8-246Q3
• 9HFGJ-KERJT-IOQ73-8YR78-93UT5
• JKJIF-YUQEW-786DM-NBDSH-GUIRE
• TQ23P-98R87-89340-83QOI-WEJF8
• DFHNG-RGTFR-89T57-6983P-UROFD
• SJHGL-IUWRT-89023-48HR4–U4938
• WHTKJL-RDHF8-7TG64-5ES42-76RY4
• 23YU7-65RK0-HEVJK-SDAGI-OP265

SP2

• KLSDJ-FERIO-UT843-U8JF8-43Y84
• 93UJF-KDSIU-YT78Y-SDKJF-IOEWJ
• FIOSD-FUHY7-ERTY7-843UR-OEJFK
• DSHFG-8734Y-78927-4932J-FKJSD
• FVHER-UIYT7-84358-93047-48294
• 2307T-78436-YKJDF-SLHNV-JKSDH
• JKSDH-FGSDH-FKJSD-MNF32-98784
• 79Y5F-I34QY-65784-30UJR-DKSDG
• OUI8W-Y3458-7934R-UREJG-KPWER
• UIT89-0432U-Y0UTD-JSMCF-KLASD
• HIUWE-Y4I78-34U5T-98234-U782T

Unknown

• JJWKH-7M9R8-26VM4-FX8CC-GDPD8
• Q3R8Y-MP9KD-3M6KB-383YB-7PK9Q
• QB2BW-8PJ2D-9X7JK-BCCRT-D233Y
• FCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8
• F6PGG-4YYDJ-3FF3T-R328P-3BXTG
• FM9FY-TMF7Q-KCKCT-V9T29-TBBBG
• RK7J8-2PGYQ-4P7VL-V6PMB-F6XPQ
• KWT78-4D939-MRKK9-64W8C-CPF33
• BJXGH-4TG7P-F9PRP-K6FJD-JQMPM
• RBDC9-VTRC8-D7972-J97JY-PRVMG
• DW3CF-D7KYR-KMR6C-3X7FX-T8CVM
• MQPD6-C748R-FMRV6-8C3QK-79THJ
• DTWB2-VX8WY-FG8R3-X696T-66Y46
• DW87C-76RXP-LLK6C-3FJ2J-2908F

Windows XP Professional 64-bit Edition

SP2 VOL

• B66VY-4D94T-TPPD4-43F72-8X4FY
• VCFQD-V9FX9-46WVH-K3CD4-4J3JM

WBD2T-3V7TW-GWJW6-HC6CK-R7MBJ

WPH7P-DQMY8-97MWQ-Y26V7-3C4HM

• M4733-B8WX6-G999M-P3YR6-TDYVM
• PFC3B-RTB4W-F3Q44-JWQQR-447BB

HH7VV-6P3G9-82TWK-QKJJ3-MXR96

F4297-RCWJP-P482C-YY23Y-XH8W3

MRX3F-47B9T-2487J-KWKMF-RPWBY

QC986-27D34-6M3TY-JJXP9-TBGMD

• C4FPJ-HQCGP-QD3XC-2JF34-FT8Y6
• CH6BH-G7PCX-KTM8K-WRKBD-HC7TW
• M4676-2VW7F-6BCVH-9QPBF-QBRBM
• DW3CF-D7KYR-KMR6C-3X7FX-T8CVM
• 7FMM3-W4FMP-4WRXX-BKDRT-7HG48
• B2RBK-7KPT9-4JP6X-QQFWM-PJD6G
• DM8R3-3VBXF-F7JRX-FJ7P4-YD3HM
• FCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8
• TCP8W-T8PQJ-WWRRH-QH76C-99FBW
• CKY24-Q8QRH-X3KMR-C6BCY-T847Y
• RBDC9-VTRC8-D7972-J97JY-PRVMG
• R3MGD-3H6HQ-RDRCR-KJXTM-3C8JW

R7Q3G-CHTW9-CCQV9-G7DX6-RVTDY

DRYCH-Q9RY7-YH62D-K98QM-KCGQ8

• DQ3PG-2PTGJ-43FP2-RPRKB-QBYRY
• DQ3PG-2PTGJ-43FP2-RPRKB-QBYRY
• BXDQR-2KCR9-2VMJK-WDW94-PH2PB
• HC47V-BMGVC-MWB4X-KJTTD-RMH4Y
• BRC43-2CBV7-TCB9W-WHRGP-39XWM
• BMHW2-GR289-D3PR9-JQF6P-YPQJM
• DB8YF-HTGKP-6C948-3BHYD-PH2PB

Windows XP Home Edition x86

• JT42G-DDBCX-WTDMB-8WCT2-JGGH8
• V7BWD-G9YR6-9FG87-8Q2HV-YJGTG
• PW6PT-TCGBR-HKTCT-GKKY6-QGK86
• MT8JF-T82RK-R6C82-3YGHH-224PP
• G7BR9-8QV29-3QFHP-F84WG-X9PYQ
• XYRYX-XCG6K-W7PK8-2CTQQ-86DWR
• VTYH4-P88R2-MW38B-Q62KT-48F7Y
• MY7CJ-VQWBC-36JWH-6CJ37-TQVHC
• XMCM6-DKYCQ-2BHQH-4PCHR-TBJCR

What's VOL and VLK?

VOLs (short for Volume Licensing for Organizations, a.k.a., VL) are any Windows OS setup CD/DVD or image files containg the "VOL" accronym, indicating that it is one of the licensed Windows copies. According to the regulations of VOL plans, VOL licensed products don't need prior activation.

VLK (short for Volume Licensing Key) refers to the product key required in the VOL edition's deployment rather than the edition name. These keys are only suitable for VOL editions, and with one effect–prove the product is legal and licensed under VOL.

According to the license agreement, the product keys for the retail editions of XP can only be used on one PC, but the ones for VOL editions can be supplied for any number of PCs for use. Second, retail edition of XP need activation, while VOL editions don't implement this concept. Last, VOL editions of XP don't have a Home Edition, and their function is exactly the same as a Professional Edition.