I have absolutely NO idea what any of this means.
Try
#1 - the CTRL+SHIFT on firing up Vegas - you WILL loose your Preference settings - to reset to Factory Default
or
#2 - A re-install as possible solution? Ugh . ..
or
#3 - Do some house-keeping to ensure you have enough "space" - maybe your "loading" is a result of a constipated PC. I had this recently and did some Spring Cleaning!
If this doesn't assist or no one replies here, then open a Tech Support ticket at Vegas Madison HQ.
Sorry . ..