10-17-2015 07:05 AM - edited 10-17-2015 07:07 AM
Graphics: Intel HD 4000
System: Win7 Pro
1) Approx. 2 month ago a windows update caused a problem with the hdmi at my laptop. There was no connection to the TV possible anymore (I tried the TV, the cable and the hdmi device already).
2) I installed a new driver (origin: Lenovo support page). Result: Windows messages that the driver is not digitally signed...Hence, the device "vga save" was set.
What I've already tried, everything as admin:
1) look for older drivers: Got only one and it didn't work
2) Tried to install a driver directly from Intel: Didn't work
3) Tried to disable the signing (GPEdit.msc - code signature ...). Here I had the problem that I even have no line with the code signature to set the ignore property
4) Tried to install the drivers (Intel and Lenovo) in the testmode. The waring message about unsigned drivers came
5) Tried to create a certificate. Here the cmd said the command is not known.
6) Tried to install the drivers (Intel and Lenovo) after setting the "TESTSIGNING" off (BCDEdit). The waring message about unsigned drivers came
Any ideas or similar experiences?
I can not believe that the Lenovo or Intel drivers are not signed. But why Windows does not accept them?
Is the available update to Win10 an option?
Generally: Failure F40 (the failure is 40 cm in front of the monitor) is not excluded
Thank you very much in advance.