I have a HP switchable graphics laptop 7690MXT/1G Duo dv7-6c running Win 764 bit. Over the past half year I have been able to get by with an old Leshcat installation, But after a recent lockup while playing a game which forced me only to boot to safe mode I tried to install through amd method 15.11.1 and it locks up during install with just blinking cursor in upper left corner.
7690MXT/1G reports as AMD Radeon HD 6700M Series
The intel driver works fine.
The error message I get is:
Windows cannot verify the digital signature for the drivers required for this device. A recent hardware
or software change might have installed a file that is signed incorrectly or damaged, or that might be
malicious software from an unknown source. (Code 52)
Device manager reports AMD driver as 15.201.1151.1010
What is the cure? I have repeated scanned for malware and have found nothing vicious. The only software changes are trying both leshcat and amd install methods. which are usually removed using DDU in safe mode.