Absence of scroll bar and sheet tab in computer with Windows 7

I have some spreadsheets which were created in a Vista Computer. I have bought a new computer which runs in Windows 7. The spreadsheets are copied through a pen drive to my new computer. The problem is, scroll bar and sheet tab are not seen, even if it is set up to display that. It seems that it is hidden because of the screen being too small. It is very urgent to solve this problem. If anybody knows how to solve this, can you please help me?
