升級 Windows 10 再度出現螢幕顯示的問題

這次免費升級 Windows 10 已經算是最方便的一次了，
不過還是出現了問題。
這個問題早在三年前就出現過了，
當時是因為更換新的液晶顯示螢幕之後發生的，
敘述如下連結的 blog 內容：

AOC 顯示器 e2343F2k 顯示解析度問題 (AMD Radeon 顯示卡)

我用的是 Gigabyte 880GMA-USB3 (內建 AMD Radeon HD4250 顯示卡)，
螢幕是 AOC e2343F2k。
驅動程式方面，
顯示卡已經更新至最新版的driver (2015/1/13 8.970.100.9001)，
螢幕的 driver 是可以找到的最新版 (2010/7/9 1.0.0.0)。
AMD Catalyst Control Center 是 2015.0727.1507.25359 版，支援 Windows 10 64bit.

從圖中可以看到左側的選單中沒有顯示器的選項，
所以也無從調整。
不曉得到底是 driver 的問題還是螢幕的問題?
目前只好忍受四邊的黑框，
並且暫時將解析度調整到 1776*1000，
再等等看 AMD 是否會替老顯示卡更新 driver 吧！

[2015.9.2 update]
AMD並不打算替 HD 5000 以下的顯示卡更新 driver 了，
當然，這也被使用者罵翻了。
 Windows® 10 Driver Support for AMD Radeon™ Graphics Products

但是還是有高手找到了解決的方法，
AMD Radeon HD 4000 Series Overscan / Underscan fix on Windows 10
但是我已經移除 Win 10，回復到 Win 7，
是否能夠解決這個問題，有待網友們告知了。
-----------以下是解決方法------------
 (本人並未測試，所以請網友自行斟酌是否使用)

• In windows 10 click Cortana, search for "regedit", and run it.
• Click File, Export and save as "backup" to wherever you want, just in case something goes wrong you can revert it back.
• On the left navigate to the path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\
• In this folder there will be multiple folders with long names, look for the one with a folder inside named "0000", there will be a ton of other settings, on the right, once you find the right one.

As an example the folder name my "0000" was located in is "{55038BE3-BCB9-4757-9ACF-05AC30F7CBF9}"

• Next right click the "0000" folder and click "Find", search for the resolution you are using, in my case it was 1920x1080.
• It will highlight it on the right, for me it was "DALR6 DFPI 21920x1080x0x59", the last number is the refresh rate for the screen, look for the refresh rate you use if the first one it highlights is not the one.
• Right click the highlighted name and click Modify
• Here we want to change all the numbers on the right to 00's, put your cursor before the number you want to change, press the "Del" key, then press "0".
• Click OK, minimize the registry and right click the desktop, Display Settings, Advanced Display Settings,and change the resolution to anything else, then back to the resolution you edited in regedit. Your underscan should be gone! (Edit: If changing resolution doesn't work, try rebooting.)