I have upgraded my Windows 7 laptop with AMD Radeon HD 7640G and 7670M dual graphics 1 GB to Windows 10 pro successfully. After I log into the system, the screen keeps blinking with horizontal lines and it seems that the device does not handle 32-bit color completely. I had installed the latest version of graphics card driver and check the settings but still can not find the options to change the color back to 16-bit color depth.
How to change 32/16-bit color bits in Windows 10 and 8.1
* From your desktop, hold-and-press or right click any empty area, and click on Screen Resolutions from menu.
* It will open the Screen Resolution properties via Control Panel > Appearance and Personalization > Display. Tap or click on the Advanced Settings link.
* Go to the Adapter Tab, click on List All Modes at the bottom. Pick up the color mode (bit) with screen resolution you would like to use from lists, and click OK button.
However, you should notice that the list of valid modes only include 32-bit, without 16-bit. Because Windows 10 and 8 haven’t directly supported 16-bit Colour. If you want to use 16 bit programs or applications for resolving the problem, try this method by running it in compatible mode.
* Right click the shortcut of app to open its Properties, go to the Compatibility tab, check Reduce color mode box, and select 16-bit(65536) color, then click OK button.
* You need to repeat the way for each app shortcut. It is useful to speed up older PC’s.