,I was going through your directions regarding purging the machine of Norton and had a question about your following quote,"

then go to your' logon name', AND 'All Users'open 'applıcatıon data' and check 'for any NIS Folder(s)

Delete them.           I could not find this.

Also, two comments if I may;

Emptying the entire prefetch folder will slow it down so you must be referring to just the entries regarding Norton,and

defragmenting will slow down any images you create as backups because the program recognizes rearranged files and the image becomes larger almost the size of a full image.

There certainly are so many caveats and conflicts these days.