tommy p.... the very original windows movie maker is still available for free. Look on Blain's movie blog. OK, it's basic but it's all I ever use. I don't mean the one that came with Windows essentials, the one before that one.
Mick..... never had the slightest trouble apart from needing to give it a rest occasionally when using for long periods. At these times I shut down completely wait a few minutes then resume. Maybe that is what you mean by getting stuck.