running vista 64 SP1 RTM
cannot print (as user or admin) from IE or see print preview, unless i turn off user account control in the control panel.
note that on another box with vista 32 SP1 RC2 this is not an issue, UAC is ON and print preview and print work fine
The only reason I suspect that this is happening is that at some time the UAC was turned off and then turned back on...
If the pc is being used while the UAC is turned off any programs or utilitys used will get certain privilidges. If then however the UAC is turned back on certain utilitys and programs may not work as before. I've found through experience that you need to either keep it turned off or turned on all the time.