Can you please detail your system specs?
Also, did you suspend your antivirus during download and install of X3?
And, did you additionally explicitly launch the install with Run As Administrator?
If using a USB connected audio interface, is it plugged into a USB 2 port? (sometimes they freak if plugged into a USB 3 port)
And lastly, is your Windows up to current maintenance levels, and drivers for your audio interface, as well?
Bob Bone