Every time I minimize my Sony to go look into a file folder, or to look at a site browser, and then when I come back to my sony vegas, there is ALWAYS this damn 30 second wait, where you see the hourglass icon indicating I must wait.
So far this is the most aggrevating thing about the Vegas, what is the deal?
De-select "Close media files when not the active application" in Options > Preferences > General.
What are your system specs? How much memory? You're prolly swapping memory from RAM to Pagefile on the HD. Do you have a lot of HD activity when changing between apps?
Don't minimize, just Alt-Tab to change active apps.