I found that the problem is that the scanner use the Letter Size dimension to scan, and I need to scan in A4 dimension. System One OS Windows The disabling persists only until the next reboot so future driver installs are verified. Actually the values are stored in reversed byte order, so they read and F82A. No need to create a signed driver as I am using this only on my home system.

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I won’t be installing Windows 10 until the end of the year, but I hope that like what murch shared the driver continues to function normally. At the end of the page A4, i get an error “Error occure But please download from Microsoft whenever possible.

It all worked quite easily and very well. I recommend the latter as it’s actually quite easy! The next time the PC restarts, the Driver Acrr Enforcement will be active and the Acer driver is installed and accessible.

Old Acer/BenQ scanner drivers (x84, x64) Solved – Windows 10 Forums

To scan in Windows 8 after driver installation, simply go to Devices and Printersright-click your scanner and click Start Scan. Thread starter ynnad Start date Dec 24, Please carefully check the specification of all your hardware that might use this driver. I take no responsibility of this fix being applicable to your hardware, neither for accidental hardware damage caused by trying or applying this fix. System One OS Win 8. My Computer Computer Type: The disabling persists only until the next reboot so future driver installs are verified.


In Windows 10, to disable Driver Signature Enforcement, you follow the following menu choices: Has anyone been able to get the transparency scanning option working on the Acerut with this method? I have upgraded my system from Windows 8. This reference may be helpful – https: Some were referenced in previous posts in this thread: Just check the “Tools” in both the web installers will do.

Thank you so much for this post.

System One OS win 8. You can also use the Metro ‘Scan’ app, although previewing scans return a very blurry image. Thank you so much for the drivers!

The preview fonctionnality of “faxAndScan” give the good image. For a better experience, zcer enable JavaScript in your browser before proceeding. The time now is I unzipped the driver package, downloaded the new inf version I use bit Win 8.

I got the scanner to work on Windows 7, 64 bit.

Does someone know how i can resolve this issue? So i think there is a bug in the dll “acerscad.

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Disabling driver signing check in Windows Please let me know if this is not allowed before removing this thread. Using a hex editor I located these values at positions to A and to btw.

Acer Scan Prisa 640U 3.40

I will use bold for hex and italic for decimal numbers. To export, simply right-click your certificate in the MMC snap-in You need to use the newer INF in the Pastebin as the old one will not sign or validate correctly. Forums New posts Search forums Unanswered.