Regarding the files deleted from the SWSetup folder, I wouldn't worry about that - this is just the location that HP software and driver installers unpack to. You can always just download the software installers from your Drivers Page if required.
Regarding the other issue, try the following.
Open windows Control Panel and in the top right, next to View by: select 'Large Icons'. From the new layout, select the 'File Explorer Options' entry. Select the View tab and then click the 'Restore Defaults' button ( bottom right ).