Excel 2003 files try to open in Word 2003 when using SPS 2003

Environment

SPS 2003

Office 2003

Issue

If I click an Excel file in SharePoint, it opens read-only in Excel, as expected.  If I use the drop down and choose Edit in Microsoft Office Excel, then the file tries to open in Word instead of Excel - which does not work, of course.

If I close all instances of Excel before trying to open from SharePoint into Excel, then it does work.  The issue only occurs when I have other instances of Excel open.

Opening Excel files from websites that are not SharePoint works as expected.  This issue only occurs with Excel files stored on SharePoint.

Other office files work as expected, also immediately upon choosing the Edit in Microsoft Office Excel menu item, I get the error below and then the document tries to open in Word.

Error Message -

The document could not be edited. The required application may not be installed properly, or the requested document cannot be opened. Please ensure that the necessary application is installed and that the path to the document is correct. If the application was set to install on first use, run the application and then try editing a document again.

Resolution

Repaired Office 2003 from control panel and everything works fine

SharePoint 2010 Versions

SharePoint 2010 Version	Microsoft Support KB	Version Number
SharePoint 2010/Foundation December 2010 Cumulative Update	2459257, 2459125	14.0.0.5130
SharePoint 2010/Foundation October 2010 Cumulative Update	2394320, 2394323	14.0.0.5128
Foundation July 2010 Hotfix	2032588	14.0.5050.5001
SharePoint 2010/Foundation June 2010 Cumulative Update	983319, 983497, 2182938 , 2281364, 2124512, 2204024 - / KB 2028568 / TechNet summary	14.0.0.5114
SharePoint 2010 RTM	N/A	14.0.0.4762
SharePoint Server 2010 Release Candidate	N/A	14.0.0.4730
SharePoint Server 2010 Public Beta	N/A	14.0.0.4536
SharePoint Server 2010 SPC2009 Demos	N/A	14.0.0.4524
SharePoint Server 2010 Technical Preview “2” [another SPC2009 demo build]	N/A	14.0.0.4514
SharePoint Server 2010 Technical Preview	N/A	14.0.0.4006

SharePoint 2007 Versions

SharePoint 2007 Version	Microsoft Support KB	Version Number
MOSS 2007 or WSS 3.0 Cumulative Update February 2011	KB2475885/ KB2475886	12.0.0.6554
MOSS 2007 or WSS 3.0 Cumulative Update December 2010	KB2458605/ KB2458606	12.0.0.6550
MOSS 2007 or WSS 3.0 Cumulative Update October 2010	KB2412267/ KB2412268	12.0.0.6548
MOSS 2007 or WSS 3.0 Cumulative Update August 2010	KB2276472/ KB2276474	12.0.0.6545
MOSS 2007 or WSS 3.0 Cumulative Update June 2010	KB983310/ KB983311	12.0.0.6539
MOSS 2007 or WSS 3.0 Cumulative Update April 2010	KB981042/KB981043	12.0.0.6535
MOSS 2007 or WSS 3.0 Cumulative Update February 2010	KB978395/KB978396	12.0.0.6529
MOSS 2007 or WSS 3.0 Cumulative Update December 2009	KB977026/KB977027	12.0.0.6524
MOSS 2007 or WSS 3.0 Cumulative Update October 2009	KB973409/KB973410	12.0.0.6520
MOSS 2007 or WSS 3.0 August 2009 Cumulative Update	KB973409/KB973410	12.0.0.6514
MOSS 2007 or WSS 3.0 June 2009 Cumulative Update	KB971537/KB971538	12.0.0.6510
MOSS 2007 or WSS 3.0 April 2009 Cumulative Update	KB968851/KB968850	12.0.0.6504
MOSS 2007 or WSS 3.0 SP2	KB953334/KB953338	12.0.0.6421
MOSS 2007 or WSS 3.0 Cumulative update	KB956056/KB956057	12.0.0.6327
MOSS 2007 or WSS 3.0 Infrastructure Update	KB951695/KB951297	12.0.0.6318
MOSS 2007 or WSS 3.0 post-SP1 hotfix	KB948945	12.0.0.6303
MOSS 2007 or WSS 3.0 post-SP1 hotfix	KB941274	12.0.0.6301
MOSS 2007 or WSS 3.0 post-SP1 hotfix	KB941422	12.0.0.6300
MOSS 2007 or WSS 3.0 SP1	KB936984/KB936988	12.0.0.6219
MOSS 2007 or WSS 3.0 Security Bulletin MS07-059	KB942017	12.0.0.6039
MOSS 2007 or WSS 3.0 August 24, 2007 hotfix package	KB941422 (updated)	12.0.0.6036
MOSS 2007 or WSS 3.0 RTM [Released To Manufacturing]	N/A	12.0.0.4518
MOSS 2007 or WSS 3.0 Beta 2 TR	N/A	12.0.0.4407
MOSS 2007 or WSS 3.0 Beta 2	N/A	12.0.0.4017