When I use Windows Explorer, or a File Open dialog in an application, I like to have the Navigation (folder) pane visible, showing the current folder in the tree.
However, I find this is slowing things down excessively - sometimes merely expanding a drive folder takes 10 seconds, during which time the explorer window, or app using the file open dialog, shows as "Not responding".
I have been fiddling with the way the navigation pane is displayed, to try to speed things up - I have unticked "Show all folders", removed everything from my quick access list and set "Always show icons, never thumbnails" in the folder view options. This helped a bit (file open could take 30 seconds not responding before I made those changes).
I have Tortoise Git installed, but surely that should not hang the system for so long?