Win8.1 Default and gVLK (KMS-key):

::Default Retail Channel (Install) Keys::
Core=334NH-RXG76-64THK-C7CKG-D3VPT
CoreN=6NPQ8-PK64X-W4WMM-MF84V-RGB89
CoreSingleLanguage=Y9NXP-XT8MV-PT9TG-97CT3-9D6TC

Professional=XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB
ProfessionalN=JRBBN-4Q997-H4RM2-H3B7W-Q68KC
ProfessionalWMC=GBFNG-2X3TC-8R27F-RMKYB-JK7QT

Enterprise=FHQNR-XYXYC-8PMHT-TV4PH-DRQ3H
EnterpriseN=NDRDJ-3YBP2-8WTKD-CK7VB-HT8KW

::gVLK KMS key (Use only with KMS Activation)::
gvlkCore=M9Q9P-WNJJT-6PXPY-DWX8H-6XWKK
gvlkCoreN=7B9N3-D94CG-YTVHR-QBPX3-RJP64
gvlkCoreSingleLanguage=BB6NG-PQ82V-VRDPW-8XVD2-V8P66

gvlkProfessional=GCRJD-8NW9H-F2CDX-CCM8D-9D6T9
gvlkProfessionalN=HMCNV-VVBFX-7HMBH-CTY9B-B4FXY
gvlkProfessionalWMC=789NJ-TQK6T-6XTH8-J39CJ-J8D3P

gvlkEnterprise=MHF9N-XY6XB-WVXMC-BTDCT-MKKG7
gvlkEnterpriseN=TT4HM-HN7YT-62K67-RGRQJ-JFFXW