Before starting set a restore point as in my previous instructions.
Editing path incorrectly can cause programs that use it to stop working, this is why you should to set a restore point.
Now go through the instructions until you have the edit box for PATH open.
You are going to move \\fumc40\winacs\ASCNET to the end of the list.
Click in the edit box and then scroll left until you find \\fumc40\winacs\ASCNET
Select: (left click&drag)
;\\fumc40\winacs\ASCNET
Don't miss out the semi colon at the start.
Then right click and select cut.
You should be left with a single semi colon separating the the two paths that were either side of the one you cut.
i.e. ...Live Shared;C:\WINACS
Now scroll to the right with the arrow key as far as you can go. That is past:
C:\Program Files (x86)\Quicktime\QTSystem
Right click and select Paste.
The end of the line should now be:
C:\Program Files (x86)\Quicktime\QTSystem;\\fumc40\winacs\ASCNET
Note the semi colon separating the paths.
You can cancel at any point if you are unhappy with the result and you can scroll back & forth with the arrow keys to check things look OK.
Then save the result by clicking OK.
Restart you PC and check to see if iTunes works.