I'm currently testing Windows 10 Techincal Preview on PC equipped with Radeon X1250. The problem is, AMD no longer supports this chip, so there is no driver with Windows 8.1(Drivers for 8.1 usually works for 10 TP). Before I was using Windows 10 TP, I used the driver for Vista by installing on compatibility mode, and that was fine. On Windows 10 TP, however, although I was able to install the driver by using compatiblity mode, but when I rebooted the system, the laptop's screen turned all black after it shown the blue Windows logo, and took almost 4 minutes to get me to the logon screen. I tried installing it by device manager, but since then, the system no longer works.
What can I do? How can I use legacy driver(which worked well with Windows 8.1) on this otherwise great operating system?