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Type in www.howtomendit.com or any url you might be able to access the internet that way. If you can there's hope. Could mean a personal hack or a virus has wiped 'something' needed. If you are able to access the net by the above way.....the quickest way is to head over to PCtools.com or openoffice.org and do a free virus scan then down load a patch if needed.
Failing that.....this link tells you how to do it in doss mode....better than I could relate....