Editing in a network enviornment can be problematic. Ordinary servers often wont deliver the video in a timely fashion because they are serving everyone and also have other duties including constant polling of computers. Keep media on local discs and disconnect from the network when editing.
Networking software often includes virus scanning app and other distractions that cannot be disabled without admin rights.
Suggest removable system drives, one for networking and the other with just the apps needed for editing.