The culprit of my hanging shutdowns was a cheap PCI to USB card.
I'm a new guy with a problem.
My PC hangs at shutdown, indefinitely. I am running Windows 7 RC1 and when I click the shutdown button in the start menu it logs off normally, then exits to the screen that says 'Shutting Down' and stays there. As far as I can tell nothing is actually happening, no HDD access etc.
I think I can point the finger of blame to one (or both) of two new pieces of hardware I installed yesterday that could have caused this.
Firstly, I installed a cheapo graphics card (Gigabyte HD 4350) which is powered by an ATI Radeon HD 4350 GPU, and so has installed with itself a bunch of ATI drivers and a piece of software called ATI Catalyst.
I have updated the drivers from their website to the very latest Windows 7/Vista ones, but my PC still won't shutdown. Although the card and software all works fine, I still suspect it is something from ATI causing this problem.
The other thing I installed yesterday (although I would be surprised if this were the problem) was a USB PCI card, popped it into a spare PCI slot and I have an extra 4 USB ports. No software needed obviously. That is working fine as well.
I did actually install one other thing yesterday, although this can't have caused the problem. It was an Antec Earthwatts 380W PSU.
Funnily enough, once the PC hangs at shutdown and I can see there is nothing going on anymore, I can simply hold down my PC's power button and it will turn off - without consequence - i.e. Windows sees this as a normal shutdown and doesn't flag up the error screen of 'Windows was not shut down properly' or whatever it is, when I next boot up.
Anyways, if anyone could help I would be very grateful, I assume you'll need some more detailed information, so just lemme know exactly what and I'll post it up ASAP.