Code for install :

Professional = XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB
Enterprise = FHQNR-XYXYC-8PMHT-TV4PH-DRQ3H

Checksums:
Windows 8.1 Enterprise (x64) – DVD (English)
Filename: en_windows_8_1_enterprise_x64_dvd_2971902.iso
SHA1:AE792B2EF982DAC7391224B624EAB8D6340D78AB

Windows 8.1 Enterprise (x86) – DVD (English)
Filename: en_windows_8_1_enterprise_x86_dvd_2972289.iso
SHA1:5EFB981C94E1223C85F3BB504D04E0642A85C1D4

Windows 8.1 Pro VL (x64) – DVD (English)
Filename: en_windows_8_1_pro_vl_x64_dvd_2971948.iso
SHA1:CFCDF895679A5116F7F1C6406C20F99A1F850E49

Windows 8.1 Pro VL (x86) – DVD (English)
Filename: en_windows_8_1_pro_vl_x86_dvd_2972633.iso
SHA1:9F1FCEC3B267EDB6F3BD02566BC889BB4A372BFD