I have a problem with a user who when she uses excel on her computer the screen flickers, only excel is effected. The spreadsheet doesn't contain any macros only basic formulas for cell addition etc. Excel doesn't do it every time and if you click and hold the mouse in the spreadsheet the flickering stops until you release the mouse button, different spreadsheet also make excel flicker, these also don't contain any macros. Her computer has been replaced with a spare one and the problem also occurs on this computer also.
From what I've read I'm thinking that this isn't excel that's causing it but then why would excel be the only app being effected?
Any ideas would be appreciated.