I tried searching for this issue or similar but it's an unusual one and difficult to search for so I'm hoping I've not overlooked a thread that contains the issue already.
Essentially I have the retail version of Windows 7 Home Premium and everything is fine until I install the Asus Xonar D2X drivers
. I've tried at least 3 versions of the drivers that I could find online. The drivers themselves work and the software installs correctly, once installed the sound works and I get the Xonar control panel.
However, once those drivers are installed most of the applications I have, Firefox, Internet Explorer, MSN, Windows Update, etc etc stop functioning properly. In order to make them function I have to set them all to run as administrator giving the UAC prompt and also meaning that some plugins etc within the apps don't function properly.
I've managed to narrow it down to just the Xonar audio drivers through a process of elimination and system restores and it is 100% reproducible.
Curiously using my motherboard's supplied soundcard works perfectly so I'm using that as a temporary work around until I can find a resolution to the problem.
Any help would be appreciated.