by Radeon 3600 you meant a HD 3xxx GPU Card. All HD 5xxx and below are not supported with new drivers.
Here is the last HD 3xxx series AMD Drivers from AMD Download page: https://www.amd.com/en/support 
There are no Windows 10 drivers for this series of HD 3xxx GPU card.
According to AMD Support all HD 4xxx and below GPU card doesn't support Windows 10:https://www.amd.com/en/support/kb/faq/gpu-615
You have two choices to make your GPU card to work.
1- downgrade you Windows 10 to Windows 8.1 or below (not supported by AMD anymore)
2- Upgrade your GPU card to one that is supported both by AMD and Windows 10.
