Hi, I have an XPS 8300 bought in 2012 with Windows 7 Ultimate (64bit).
Now I upgraded to Windows 10 PRO (64bit) and found some problems.
The first problem I had was with the Bluetooth (Dell Bluetooth 365 module). After upgrading the operating system, the Bluetooth did not work because drivers were probably incompatible with Windows 10. For this problem, I searched for a solution and I find (thanks to this forum) that the card is made by Broadcom and is also used by Lenovo some of its computer. So I downloaded and installed the file from this link ( http://support.lenovo.com/us/en/downloads/ds031759 ) and now Bluetooth works with Windows 10!
The second problem, which I have not yet solved, is the wi-fi (Dell Wireless 1520 (802.11n) half-mini module). As for Bluetooth also the wi-fi stopped working with Windows 10. This card also is produced by Broadcom, but I did not find working drivers for Windows 10!
Someone would know help me?
In any case, I am surprised that Dell does not offer support for Windows 10, for PC like mine.
I also have a laptop HP Pavillion, since 2009, and it all works perfectly with Windows 10 ...