1. Just right mouse click on install32.exe or install64.exe (depending on your version of Windows) and choose "Troubleshoot compatibility".
2. After it you need to test the program. The installer will ask you to plug out and plug in the modem, and save settings.
3. After that click on the suitable installer version (install32.exe or install64.exe) and the Alcatel X200 USB HSDPA modem driver will be installed properly on Windows 8.
You can download the Windows 7 driver for Alcatel X200 USB HSDPA modem below