Attention owners of Sony VAIO PCs: hold off on the Windows 10 upgrades. Sony is strongly advising against upgrading until it has released updated information, drivers, applications and instructions. That might be a while away.
Screenshot from Sony VAIO Support Page
Sony no longer owns the VAIO brand after selling off the business in early 2014. It still provides support to various VAIO models that were sold when it owned the brand.
For Sony VAIO PCs that run Windows 8 or Windows 8.1, updated drivers and applications will be released in October and November, respectively. For machines running Windows 7, unfortunately Sony has no plans to update anything for that OS.
"To ensure your VAIO PC works with Windows 10, it is strongly recommended that you wait to upgrade your PC until the drivers are ready," Sony said on it's VAIO support page.