Hello,
Is there any support for Cubase 6 with OS Windows 10?
Here is the current statement regarding Win 10: http://www.steinberg.net/en/newsandevents/news/newsdetail/article/compatibility-of-steinberg-products-with-windows-10-3291.html
Cubase 6 has been discontinued for several years, so I do not expect that it will receive any further development for new operating systems. It is supported for 10.6 · 10.7 · 10.8 and Windows 7 · Windows 8