My System is Windows 7 Ultimate on a Shuttle SP35P2 Pro Barebone. Everything worked nicely, even entering standby and resuming from it.
Yesterday I installed a new graphic adapter (XFX HD5750), removed the old drivers completely, installed the latest XFX drivers.
Since then resuming from standby does not work anymore. After standby I need to switch the computer off the hard way, and sometimes it won't even boot directly afterwards, just shows a black screen. After some time it will boot again.
Any ideas what causes this to happen?