If you are the customer, I will recommend to you the easiest fix and go from there. You are paying the bill so I will make you happy. I wasn't thinking of forcing something on a customer as they usually could care less, they just want it to work.
I have recommended that customers loose their paid Norton Security and let me install a less CPU hog of a security program. But if they say no, I leave the Norton.
Now I have a client that I delivered a new system to 2 months ago and it has Office 2010 on and she is having all manner of problems with word, and printing and Adobe.
We have uninstalled and reinstalled MS updates, the Printer drivers, office and adobe and most of it went away but not all.
I'm not much of a registry hacker so other than cleaning the registry or using some other tool, next stop for her is a reload.