Win 8.1 Upgrade Disabled Twist Touch Screen Fixed

After a Win 8.1 Upgrade, I had no touch screen function. Calls to Lenovo led nowhere Same with searching Microsoft boards. I fixed the issue on Sunday 6/1- No help from Lenovo or Microsoft.
For me it was finding two "Unknown Devices" in the HID section of Device Manager which did not have drivers installed. After researching and determining that Win 8.1 will not allow unsigned device drivers, and also seeing the "Update Driver" option failing because the drivers on the laptop that fit the problem were getting an 'INF unsigned driver error', I went through the steps to allow unsigned drivers... Charm Bar>Settings>Change PC Settings>Update and Recovery>Recovery>Advanced Startup>-Restart> Troubleshoot>Advanced Options>Startup Settings> Restart and then Chose #7>Allow Unsigned Device Drivers and Restart again... then Updating the two Unknown Devices with the drivers already on the Twist.... and voila- the errors disappeared and the touchscreen returned to full function.
I don't know if this happened to many people, but Lenovo had no idea what to do. They wanted me to ship them the laptop and allow them to roll it back to Windows 8. Posting here to distribute it to a larger audience. Maybe someone at Microsoft should call Lenovo too or Lenovo should call Microsoft. The Twist is a great laptop with Win 8.1 when everything works the way it should.
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Hi Cvj17,
Welcome to Lenovo Community!
As per your query we understood that you are looking driver for Unknown device. In some system after installing all the drivers also the unknown device will show in Lenovo Solution Center, hence confirm it once in device manage is there any Unknown adapter is showing in that.
Please install Lenovo System Update application and run it to verify the driver automatically.
Unknown Device issue.
Hope this helps.
Best regards,
Hemanth Kumar
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Solved!
Go to Solution.

All,
We have a firmware update for the touchscreen that is in process of being released through our support site. Since there could be multiple causes as discussed in the other thread, I can't promise this will be the solution for you.
However, I've attaching the file to this forum post. Download it and rename it from .abc to .exe. I renamed it .abc to get around some limitations with attaching executables. To install, be sure AC is attached and double click the file after you have renamed it.
Let me know if this helps.
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
Program Manager, Lenovo Social Media (Services)
twitter @lenovoforums
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Attachments:
AutoUpdater.abc ‏1031 KB

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Win 8.1 Upgrade Disabled Twist Touch Screen Fixed

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