Well, if you are always that short on information, I'd take it as given that you get no help. Sorry, but you are talking about big black box. You have not provided any proper system information nor explained your procedures. I don't see how installing Adobe software should affect the operation of an unrelated program, but assuming you mean exporting PDFs, it's thinkable that replacing globally shared PDF libraries might have unwanted side effects. Still, I'm sure there is some technote somewhere that says that it only works with Acrobat 9 or similar...
Mylenium