I updated to Windows 10 as soon as I could by manually downloading the ISO and performing the update.
This was fine and everything was running well, I was prompted by AMD Catalyst and some other apps to update my dispaly drivers, so I did. (I also know people who had to update the nVidia ones too)
Everything seemed to be going fine but occasionally I would get random crashes and just a dark blue screen. THe PC would be completely frozen.
Knowing how much of a pain it was to install my graphics card in the first place (I have an AMD r9 290 and kept getting the dreaded black screen) I proceeded to completely remove my graphics drivers with the Guru 3D display driver uninstaller.
The downloads are at the bottom of the page.
This software restarts Windows into safe mode and allows you to completely remove the display drivers for a fresh install of the graphics card drivers. It also prevents Windows from installing drivers from Windows Update.
I then proceeded to download the Windows 10 drivers from the AMD site and install these.
So far no crashes!