Sony Movie Studio Platinum 13 - Rendering output movie freezes, or has glitches in rendered file
I have found the following to work:


Restart the PC
Reset Movie Studio settings to default by:


Hold down Ctrl and Shift when starting program 
When the software starts to load, a window asks, Do you want to reset all program preferences to default? Select Yes. 
Make sure to tick the checkbox, Delete all cached application data.

Deleting all .sfk files can also help with problem projects 
The default MP4 and AVCHD files seem to be pretty reasonable quality, and less error-prone.


Extracted tips from: https://forums.creativecow.net/thread/208/883399