I fixed my multiple instance issue (running XP) by uninstalling Office 2003.

I left 2003 on the PC after the 2007 install in case there were issues with
add-ins. After a month of testing, and fighting multi instances, I
uninstalled the old version which solved the problem.

"Tim Childs" wrote:

Hi

thanks for that.

I have entered the Run command in Vista:
"C:\Program Files\Microsoft Office\Office\Excel.exe" /unregserver

but received the error message:
Windows cannot find €˜€�C:\Program. Make sure you typed the name correctly,
and then try again.

Any ideas?

Thanks

Tim

"Sheeloo" wrote in message
...
Try

Close Excel first and On the Windows Taskbar

1) Start-Run- excel.exe /unregserver -OK.
2) Start-Run- excel.exe /regserver -OK.

Note the space between exe and /regserver

You might have to designate a full path to excel.exe (most likely
C:\Program
Files\Microsoft Office\Office11) if you have Excel 2003 (ver 11)

In that case Start-Run- "C:\Program Files\Microsoft
Office\Office11\excel.exe" /regserver - OK

Note that quotes are required because of spaces in the path

"Tim Childs" wrote:

Hi

tried using Google search without success

how do I stop the system opening multiple instances of Excel when
launching
Excel files from Windows Vista Explorer?

thanks

Tim