Win8 consent.exe "File system error -1073741819"

consent.exe ([UAC]) is failing for me every time I try to install a program or driver, or disable UAC;

Faulting application name: consent.exe, version: 6.2.9200.16384, time stamp: 0x50108159
Faulting module name: ntdll.dll, version: 6.2.9200.16420, time stamp: 0x505ab405
Exception code: 0xc0000005
Fault offset: 0x0000000000005552
Faulting process ID: 0x2bbc
Faulting application start time: 0x01ce184623ef0458
Faulting application path: C:\WINDOWS\system32\consent.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
Report ID: 6296dc08-8439-11e2-be7f-bc5ff40e81d2
Faulting package full name: 
Faulting package-relative application ID: 

The popup windows states "File system error -1073741819", so it might be a filesystem error or maybe registry error? Can I reset UAC somehow?

I have been removed a lot of installer program, ran windows repair and checked the drive, I havent found anything with this.

This seems to help

1. Settings set system sounds - selected all off
2. Disabled UAC
3. Uninstalled all sound drivers
4. reboot
5. reinstalled sound drivers
6. enabled UAC again