I am trying to work with some spreadsheets located in another PC of our local
network, which has Windows 98. I´ve got Windows XP Professional. In fact, the
files are located in a folder which has no restrictions to me.

Since I installed some critical updates I have been unable to modify any of
these spreadsheets as Excel tells me it is imposible to save the changes, and
also to work with the temporal file it has created and save it with other
name than the original. As I said, I have total control over the files in
that folder so I can create and delete files, read them but not modify them
now.

I have tried reinstalling Excel 97, upgrading it with Office 97 Service Pack
2b, upgrading it to Excel 2000... but no way to solve this problem. On the
other hand, we have not made any changes to this folder´s access rights.

Any suggestions on why this is happening?
Best regards and happy new year to all,
Alfonso