I rolled my machine back to prior to installing any Corsair Link software. Thereafter I was lucky to be in time to get my hands on the new CL version 4.9.1.23 and so I installed this and the USBxp drivers installed without a problem. No errors about unsigned software.
My system has a super user (Administrator account) and a few non administrator accounts. I then picked up an error about System.UnauthorizedAccessException.
To resolve this I did the following:
1. Logon with administrator rights
2. Go to the directory where CorsairLink4 is installed (C:\Program Files (x86)\CorsairLink4)
3. Right click on CorsairLink4.exe
4. Click the Compatibility tab
5. Place a check mark in "Run this program as an Administrator"
Problem solved on my system. Whenever I click on CorsairLink4 I get prompted to enter an administrator password and CL starts up.
Check the following posting to find out how I rectify the incorrect number of fans and temperature sensors:
http://forum.corsair.com/forums/showthread.php?p=925823&posted=1#post925823
Luckily resolving the incorrect numbering of CPU cores is easy, just click on the CPU core of your choice and change the number after the # to the correct value and click on apply.
I also tried a few runs of installing 4.8.0.82 and 4.7.0.77. 4.7.0.77 installs the unsigned drivers as well as some other software. What I can vouch for is that after this I was able to install 4.9.1.23 and it replaces all the drivers and remove the extraneous software item successfully.
