Microsoft has announced extended support for Skylake systems with Windows 7 and Windows 8.1. Please refer to the following links:

Further information:
Information on extending Skylake support for Windows 7 and Windows 8.1
Microsoft Skylake systems page
Microsoft operating system support overview

This arrangement applies to the following TERRA systems: 

TERRY PC systems 

TERRA PC-BUSINESS 5000 i6100
(1009498, 1009519, CH1009498, FR1009495, FR1009498, NL1009498)

TERRA PC-BUSINESS 5000 i6400
(1009485, FR1009485, NL1009485)

TERRA PC-BUSINESS 5000 Silent i6100
(1009492, NL1009492)

TERRA PC-BUSINESS 5000S i6100
(1009494, FR1009494, NL1009494, UK1009494)

TERRA PC-BUSINESS 5060 i6400
(1009491, 1009503, CH1009491, CH1009460, FR1009491, NL1009503)

TERRA PC-BUSINESS 6000 i6400
(1009484, 1009490, CH1009490, FR1009484, NL1009484)

TERRA PC-BUSINESS 6000 i6500 Silent vPro
(1009509, CH1009509)

TERRA PC-BUSINESS 6000 i6600 Silent+
(1009502)

TERRA PC-BUSINESS 7000 i6700 Silent+
(CH1009502)

TERRA PC-BUSINESS 7100 i6700 Silent+
(1009514, CH1009478, FR1009478, NL1009478)

TERRA PC-BUSINESS Silent "MARATHON"
(1009512, CH1009512)

TERRA notebook systems

TERRRA MOBILE 1513A
TERRRA MOBILE 1513S
TERRRA MOBILE 1542
TERRRA MOBILE 1590S
TERRRA MOBILE 1790S
TERRRA MOBILE 1775