This fix in another thread by Grapefruit has worked for me for about 2 days now and counting:
If some of your keys are typing random strings of letters the fix below worked for me.
1 - Uninstall the Corsair CUE software and any other previous Corsair software installations. (Located in Control Panel > Programs and Features)
2 - Hold the windows key and press "R" to open the windows run command
3 - Type in %APPDATA% and press enter
4 - Delete the Corsair Folder (backup any settings or profiles if you wish by saving it somewhere else)
5 - Run a registry cleaning software such as CCleaner (Run registry scan and fix all issues, backup the registry if you like)
6 - Restart your system
7 - Install the Corsair software only for your specific hardware
http://softwaredownloads.corsair.com...78_release.msi