They warn that this doesn't mean that these VAIO PCs will not face additional issues.

Sony has provided this list of limitations based on their preliminary tests. How to stop Windows 10 from automatically rebooting itself If you like this article, please share it! -> Sony expects to release new upgrade information and/or driver upgrades by October 2015 for VAIO PCs with Windows 8.1 preinstalled, and November 2015 of VAIO PCs with Windows 8 preinstalled. They will continue to test these newer VAIO systems and issue additional compatibility information and/or Windows 10 driver updates later this year. That's why Sony pointed out that systems that pass these preliminary tests will not necessarily be fully functional with Windows 10. In other words, these are only initial tests. What did they mean by preliminary tests? Basically, they just upgraded from Windows 7 or Windows 8/8.1 to Windows 10 on thos VAIO PCs and checked to see if 'anything broke'. Please note that the following advisories are based on preliminary tests that Sony ran. Sony will not be testing the older VAIO PCs, so if you are wondering whether it's safe to install Windows 10 on those systems - you will only know when you actually install it yourself. No tests were performed on older systems. First of all, Sony only tested 2011 and newer Sony VAIO PCs.

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