On this system the WLAN AutoConfig service will not start:
In error log/system:
"The WLAN AutoConfig service depends on the NativeWiFi Filter service which failed to start because of the following error: Windows cannot verify the digital signature for this file. 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."
In error/log security:
"Code integrity determined that the image hash of a file is not valid. The file could be corrupt due to unauthorized modification or the invalid hash could indicate a potential disk device error. C:\Windows\system32\drivers\nwifi.sys"
I ran sfc /scannow and it found no errors.
Finally I directly compared these files with the same files on another Windows 7 machine. They have identical sha256 and md5 sums, and the other machine thinks that they are signed.
What is happening?