If you don't have a Microsoft Office/Microsoft Word CD, one idea would be to uninstall Microsoft Office/Microsoft Word (Via Start -> Control Panel -> Uninstall a program) and then install Microsoft Office 2010 Beta, which you can download for free.
This will expire on 30th October, but at least you'll have until then find or buy the CD.
By the way, did these problems happen recently? If so you can use System Restore to return all your settings to how they were before the problem occurred. Just go to Start -> All programs -> Accessories -> Systems Tools -> System Restore. Go for 'Choose a different restore point', 'Next', tick 'Show more restore points', and then choose from the list a date before you had this problem.