Hi,

I work with windows 8.1 x64 (acer e5 551 t7v0).

to install the driver of my device, i need to install it after disabling windows signature verification because I modified myself this driver.

It works perfectly the first day, whatever if I restart or stop and start the computer.

The day after the installation, it doesnt work. When I go to the device manager, no event's say that the driver has been modified.

I dont understand what is happening. Why does the driver is not used by windows after the first day ? How can i do this driver work forever ?

Thank you for your help

Hi,

I considered that this driver was failed to load properly.

Please refer to these steps to completely restart your computer to see if it can work fine:

What you can do is, open the command prompt (admin),  type the following command and hit Enter:

    shutdown /s /f /t 0

This will make your Windows 8 computer shutdown fully. Then start your computer.

If the issue doesn't persist, please try to disable Windows 8.1 fast startup to make this driver work fine.

How to disable or enable Fast Startup in Windows 8.1
http://winaero.com/blog/how-to-disable-or-enable-fast-startup-in-windows-8-1/

If the issue can't be fixed this way, please help to collect the Event log and post back here for our research.