I know some people take that to mean a windows computer, but when I say it, I usually mean it by its literal term of personal computer, sorry for the confusion.
If you mean you have a Mac Desktop computer (the use of PC here tends to mean a windows machine) and it is trying to find a computer that was at the IP address you list then try looking in System Preferences > Users and Groups > Your Account > Log In Items.
I do note though, you say you have not got anything in this spot.
Correct, I have checked here and there are no network shares listed.
I tend to have the Drives I have previously mounted but want to have loaded each time I start my computer.
This saves using the Finder > Go Menu > Go to Server and entering User Name and passwords in the dialogue box.
I mount my NAS Drive this way and the backup USB drive on my MacBook Pro so it shows on my iMac
I have checked here and the list only shows one network server that I have running at a different IP address that I connect to successfully. Just to eliminate any possible issue, i have removed it, rebooted, and then re-added it to my list.
That AppleScript would also be in the Login items (Or listed there while actually being somewhere else, most likely ~/Library/Scripts)
It is also possible the Script is on the DOCK and not in Login items.
The Apple Script Editor might gives clues in it's Recent List (File Menu)
Thank you for this suggestion, i will check on this and report back.