I had no problems upgrading my older Lenovo (IBM) T60 Laptop
However it replaced the video driver with the Microsoft Basic Display Driver.
The Laptop was functional however it would not play videos beyond the lowest definitions

AMD note with respect to Radeon Display Adapters:

Windows® 10 Driver Support for AMD Radeon™ Grap... | Community

Products That Do Not Support Windows® 10

AMD Radeon™ HD 4000 Series products and older are not certified to support Windows Display Driver Model (WDDM) 1.2 or higher and therefore, do not have driver support for Windows® 10.

The following is a list of graphics products that do not support Windows® 10:

  • ATI Radeon™ HD 4000 Series /ATI Mobility Radeon™ HD 4000 Series Graphics
  • ATI Radeon™ HD 3000 Series /ATI Mobility Radeon™ HD 3000 Series Graphics
  • ATI Radeon™ HD 2000 Series /ATI Mobility Radeon™ HD 2000 Series Graphics
  • ATI Radeon™ X1### Series/ATI Mobility Radeon™ X1### Series Graphics
  • ATI Radeon™ X### Series/ATI Mobility Radeon™ X### Series Graphics
  • ATI Radeon™ 9000 Series Graphics
  • ATI Radeon™ 8500 Graphics
  • ATI Radeon™ 7500 Graphics
  • ATI Radeon™ DDR Graphics
  • ATI Radeon™ 7000 Graphics
  • ATI Radeon™ 7000VE Graphics
  • ATI Radeon™ 7000LE Graphics

Windows® 10 will install the default Microsoft® Basic Display Driver (MBDD) for these graphics adapters. MBDD provides basic display functionality (low resolutions and color) on a single monitor but DOES NOT support:

  • Display scaling control
  • Multiple displays
  • Display rotation
  • Video capture
  • Power settings
  • VSync control
  • Brightness control on integrated display panels
  • AMD Catalyst™ Control Center

If your system is equipped with an AMD Radeon™ HD 4000 Series product or older, you may consider the following options:

  1. Continue using the existing operating system.
  2. If you have already upgraded to Windows® 10 and would like to revert back to the previous version of Windows, refer to this Microsoft page for instructions.
  3. Upgrade to an AMD graphics product that provides Windows® 10 support. For information about resellers and product availability, visit: http://shop.amd.com

However this is NOT true per your only options!

Go ahead & do the upgrade to Windows 10 - it WILL install the Micrsoft Basic Display Adapter.
Indeed there is no Windows 10 Driver - however there IS a Windows 7 Driver and it works just fine!

You need to get the driver from the Microsoft Update Catalog - note that you will have to use Internet Explorer and open/Run it as Administrator (will not work with other browsers, not even Edge)
Once you get the CAB, extract it to a folder (I used 7-zip);
then open the Device Manger and select the Display Adapter & "Update Driver"
Point the selection from 'Have Disk' to the unpacked CAB folder and include sub-folders, click 'next', then select the appropriate driver for your display adapter .
In my case it found x1300 (I had expected x1400) but installed that anyway and now graphics work perfectly, even for 1080 videos.

For me the driver installed from the unpacked CAB - if it does not work, try the following:


However, if you try to install this CAB straight off it doesn't install correctly; it says a file is missing when you try to install the package. But here's what you can do:
Save the CAB to a folder.
Extract the contents of the CAB.
Open up one of the INF files.
Search for the string "SourceDiskNames"
Look at line below. It probably ends with something like ".\B_72690"
Create the folder B_72690 inside the folder you extracted the CAB into, and extract the contents of the CAB *again* to that folder. This is untidy but it gets the files where it expects them.
Great, right? Not so fast. if you now try installing it, it will cause a crash due to a unhandled kernel thread exception in atiumdag.sys. You need to restart into Safe Mode (hold down shift when selecting "Restart", and it's within "troubleshooting/startup options"), and install the driver there, where it won't automatically activate. If the Start Menu isn't working properly in Safe Mode, try using Winkey+R, "devmgmt.msc".
Open up the basic display adapter and upgrade the driver using the "Select a driver from a place I know/Have Disk" option in Device Manager. Select the folder you first extracted the CAB to, not the specially-named subfolder. If all went well there should be a compatible, signed driver option with your device's name on it. Once installed, reboot, and there you go!
I did not need those additional steps - when I unpacked the CAB using 7-zip, the B_72690 folder was already present and I was able to load it directly without having to run in Safe Mode.

Also note that I did not install Catalyst - just the driver.