I am running Vista Business with Office 2007.  Since about a week I
experience some problem with Excel crashing all the time either when working
on it or also on exit.  It starts up and then sometimes I can work for a
couple of minutes and then it crashes.  I tried to repair it, uninstall and
reinstall it again but still the same.  The error I am getting is:

Problem Event Name: APPCRASH
Application Name: EXCEL.EXE
Application Version: 12.0.4518.1014
Timestamp: 45428263
Fault Module Name: OLEAUT32.dll
Fault Module Version: 6.0.6001.18000
Fault Module Timestamp: 4791a74f
Exception Code: c0000005
Exception Offset: 0004580
O.S. version: 6.0.6001.2.1.0.256.6
Local ID: 2057

Additional info
LCID: 1033
Brand: Office12Crash
skulcid: 1033

I run out of ideas and any help would be highly appreciated.

Thanks to all for you ideas