I've had the same problem. After DAYS of trying to figure it out, I finally
found this, which worked for me.
http://support.microsoft.com/default...b;en-us;840169
"SCG" wrote:
> Having the same F***ing problem - driving me nuts. My computer is now
> basically worthless if I cant get into and out of Excel. I agree that
> Microsoft is more and more painful to work with...
>
> "BGG" wrote:
>
> > I tried installing Office XP Service Pack 3 and was prompted for a CD which I
> > believe I received when I bought my computer but have not needed it in over
> > five years and as such it is most likely lost. I tried to install the full
> > version as a workaround but this did not work – I was still prompted for the
> > CD. To complicate matters, I now cannot use Excel – when I try, I am
> > prompted for a CD. Please advise. Rgds, BGG