error 0x8024002D with Office XP SP3

I have Excel, work and Powerpoint 2002 in my XP (all in spanish). All XP
updates and security updates have been always succesful.

3 days ago I was promped by Microsoft to install the "Office XP SP3"
security patch. I accepted. It does not work because it asks for a CD with
Framework. I do not have any CD as the programs were pre-installed and the
place I did buy the PC does not longer exist. What to do? Moreover, the WORST
is that I can not open Excel any more. It is looking for "XP-Framework". --
Can't I undo the changes (whatever it did)? -- Please, if you give some
links, give them detailed, as it is really difficult to find one's way in
Microsoft 'help'.