No just an ordinary shutdown, then unplug it, or turn it off at the wall so it has no power and residual data is lost.
Not saying it will fix the problem, just that I have had issues that persist until full shutdown.
Another one I have heard of, is to go into bios and disable onboard sound, boot, shutdown, re-enable.
I have also had an issue with a fresh Windows install, and my DTS DCH driver, sounds like too much spatial.
The above fixes it, however if I re-install, I don't get the issue at all, only when fresh.
DTS:X, will configure the spatial APO (built in Windows), which is why audio quality increases just by installing it.
My best guess is for some reason Windows misbehaves if the previous driver was Microsoft.
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Multiple times I have seen people ignore restart requests by drivers and software, not good.
Windows is not Linux, you definitely need to shutdown (restart), if told to.
The boot process for my Asus mobo is different to the boot process for a restart.
A shutdown boot there is a delay period with blank screen, restart none.