'load shedding; is not natural as a noun at all. You would still need to say ‘by a vehicle which shed its load on the road’ or simply say ‘by traffic problems’ or similar.
‘starting up a computer’ is not something that takes place ‘on time’ so that part isn’t logical.
As I’ve already say ’ coming to a forum late’ is not logical.
[b]Having been delayed by traffic problems, I was later than usual logging on to the forum.
Not having been notified of the forum discussion, I logged on too late to take part.[/b]
The preposition ‘to’ is better in combination with ‘came’ since it indicates movement/direction towards something.
The guideline you are referring to seems more connected with time (rather than location OR movement/direction):
[i]- I’ll meet you in New York at 4 o’clock on Friday.
I visited New York in 2003.[/i]
Your guideline might work with location sometimes, Ahmedlyton, but definitely not always, so I’m not sure it’s actually a good one to use.
- I work in the Human Resources Department at IBM.
In the sentence above, IBM is bigger than the Human Resources Department, so your guideline doesn’t work there. But in the following sentence, your guideline does seem to work:
- I live at 1600 Pennsylvania Avenue in Washington, DC.
[color=white].