Try the following links:

http://www.cpearson.com/excel/StartupErrors.htm

http://www.jkp-ads.com/Articles/StartupProblems.asp

FWIW when my XL2003 (version 11.0) broke (different problem to you), I
followed all steps on both sites before manually pruning the Registry. If
you reach this stage, make sure you prune the right registry key.

http://excel.tips.net/Pages/T002959_..._of_Excel.html


--
Steve

"mathematic" wrote in message
...
Every time I try to open Excel a windows installer pops up.
It was working fine until recently.