Why is my ViewSonic LCD monitor can not install the driver?

Users questions: Yesterday, reinstall the computer, and taking into account the driver CD, there is no backup program backup display driver. Is to buy time before the computer sales staff to install, but this time, how have no means to ViewSonic monitors work, although each installed display driver, all driver safety tips Fitted well, but the "video controller (VGA)" does not always display driver. Will the master, how is this going?
Experts answer: installed wrong, liquid crystal display driver is not installed should be able to use; you say "VGA" video card driver video controller is not installed.
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