So with movie maker i do nothing special besides crop a few videos and while doing so ill either go one of two things

first problem is that when i open movie maker and play a video my speakers wil start blasting a loud buzzing noise making me restart my computer and nothing else does that.

second problem i have is that when its not buzz i try to crop out a few parts and it starts to delete everything there and wont allow me to edit normally.

please help!