Excel Margins

I would appreciate any help with this problem in Excel.

I recently upgraded to a new Windows 8 computer and am using a trial version of Office 2010. As far as I can tell, it has no limitations in terms of functions. However, when I view a spreadsheet that I had created a few months ago in Print Preview, it no longer fits onto one page as it did before. The margins/zoom/fonts/etc. are all the same as when it was created, and I am viewing it with the same printer (Microsoft XPS Document Writer). The spreadsheet was created on a computer with Vista and Windows 2010. I have no printer that I can print to to see if it does in fact fit, but when I save it as a PDF and open it with Adobe Reader, it appears as it did in print preview where the right and/or bottom sides are cut off.

When I tried it on other machines:
1. Windows Vista & Office 2010 - Fits onto one page
2. Windows 7 & Office 2007 - Fits onto one page
3. Windows 7 & Office 2010 - Fits onto one page
4. Windows XP & Office 2003 - Fits onto one page

I have also tried installing a trial version of Office 2007 onto my computer (Win 8), but it still appeared as it did with Office 2010. I cannot understand what the problem is since the only difference I know of between all the computers I tried and mine's is the operating system. I have not been able to test the file on any other computers with Windows 8. Also, I don't believe it has to do with the specific file since this issue applies to all of my excel files.

Please help and thank you in advance.