Hi,
I tried to create a workbook with 60 sheets, but I can scroll and click through all worksheets without any problem.
Problems with displaying anything in Excel are often problems of the graphic or printer driver. You should try to update them, if possible, and if this doesn't help you could try to go to the Excel options in the Advanced tab and go to the display options where you can disable hardware acceleration, maybe that works in your case.
Cheers,
Christian