Well it seems that Microsoft has further clarified what units will be supported with win 7 and win 8 through July17th 2017.For Now it appears that Commercial HP,Dell,Lenovo and NEC are safe until July 17th.
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List of HP supported Windows 7 and Windows 8.1 commercial and workstation devices on Skylake platforms
Desktops EliteDesk 800 TWR G2 EliteDesk 800 SFF G2 EliteDesk 800 DM G2 35W EliteDesk 800 DM G2 65W EliteOne 800 G2 AiO 23 T/NT (GPU down) EliteOne 800 G2 AiO 23 T/NT ProDesk 600 SFF/MT G2 ProOne 600 G2 AiO 21.5T/NT ProDesk 600 DM G2 ProDesk 490 G3 MT ProDesk 480 G3 MT (China only) ProDesk 400 G3 MT ProDesk 400 G3 SFF ProDesk 400 G2 DM ProOne 400 G2 AiO T/NT HP Z240 SFF HP Z240 Tower HP Z238 Notebooks/Tablets Elite x2 1012 (web support for Windows 8.1 only) EliteBook 1040 G3 EliteBook Folio G1 EliteBook 850 G3 EliteBook 840 G3 EliteBook 820 G3 ProBook 650 G2 ProBook 640 G2 ProBook 470 G3 ProBook 450 G3 ProBook 440 G3 ProBook 430 G3 Spectre Pro x360 G2 HP 340 G3 HP 240 G4 HP 250 G4 ZBook 15 G3 ZBook 15u G3 ZBook 17 G3 ZBook Studio G3 - DELL supported Windows 7 and Windows 8.1 commercial and workstation devices on Skylake platforms
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Latitude 12 7000 Series (E7270) Latitude 14 7000 Series (E7470) Latitude 12 5000 Series (E5270) Latitude 14 5000 Series (E5470) Latitude 15 5000 Series (E5570) Latitude 14 3000 Series (3470) Latitude 15 3000 Series (3570) Latitude 12 7000 Series 2-in-1 (7275) Latitude 11 5000 Series 2-in-1 (5175) Latitude 11 5000 Series 2-in-1 (5179) OptiPlex 7000 Series (7040) OptiPlex 5000 Series (5040) OptiPlex 3000 Series (3040) OptiPlex 24 7000 Series All-in-One (7440) OptiPlex 22 3000 Series All-in-One (3240) Precision 15 7000 Series (7510) Precision 15 5000 Series (5510) Precision 15 3000 Series (3510) Precision 17 7000 Series (7710) Precision Tower 3000 Series (3420) Precision Tower 3000 Series (3620) Vostro 24 5000 Series (5450) Vostro Desktop 3000 Series (3650) Vostro Desktop 3000 Series (3653) Vostro Desktop 3000 Series (3250) Vostro 14 5000 Series (5459) Vostro 14 3000 Series (3459) Vostro 15 3000 Series (3559) Inspiron 17 7000 Series (5759) Inspiron 14 5000 Series (5457) Inspiron 14 5000 Series (5459) Inspiron 15 5000 Series (5557) Inspiron 15 5000 Series (5559) Inspiron 14 3000 Series (3459) Inspiron 15 3000 Series (3559) Inspiron 20 3000 Series All-in-One (3059) Inspiron Desktop 3000 Series (3250) Inspiron Desktop 3000 Series (3650) Inspiron 24 7000 Series All-in-One (7459) Inspiron 24 5000 Series All-in-One (5459) Inspiron 24 3000 Series All-in-One (3459) XPS 15 (9550) XPS 13 (9350) XPS 8900 Alienware X51 R3 Alienware 13 R2 Alienware 15 R2 Alienware 17 R3
- LENOVO:supported Windows 7 and Windows 8.1 commercial and workstation devices on Skylake platforms
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Desktop/Workstation System Windows 7 32-bit Windows 7 64-bit Windows 8.1 32-bit Windows 8.1 64-bit ThinkCentre M900 Y Y ThinkCentre M800 Y Y ThinkCentre M700 Y Y IdeaCentre B750 Y ThinkCentre X1 Y Y ThinkCentre M900z Y Y ThinkCentre M800z Y Y ThinkCentre M700z / E74z Y Y ThinkStation P310 Y Y ThinkPad Notebook System Windows 7 32-bit Windows 7 64-bit Windows 8.1 32-bit Windows 8.1 64-bit P50 Y Y P70 Y Y X260 Y Y Y X1 Carbon Y Y Y X1 Yoga Y Y Y Yoga Y Y Y Yoga 460 Y Y Y Yoga 14 Y Y Y E460 Y Y Y E560 Y Y Y Yoga 13 Y Y 11e, Yoga 11e Y Y Lenovo Notebook System Windows 7 32-bit Windows 7 64-bit Windows 8.1 32-bit Windows 8.1 64-bit B41-80 Y B51-80 Y M41-80 Y E31-80 Y E41-80 Y E51-80 - NEC
For NEC click on these Link
Microsoft also stated:
For each of the supported systems listed on the OEM pages, the OEM has committed to additional testing, regular validation of Windows Updates, and publishing drivers and firmware for Windows 10 on Windows Update which will help unlock the security and power management benefits of Windows 10 once the systems are upgraded.
