I have installed an Add-In from www.download.com for MS Excel with the name 'Simple Excel Shortcuts'. The installation file has an .xla file as add-in.
I installed the same. But when I open the MS Excel and clicking on the 'Data' tab immediately an error message with 'Microsoft Visual Basic' with a white 'X' symbol inside a red circle showing error number 400 with two options below 'OK' and 'Cancel'. If I click on 'OK' the dialog box is being closed and no problem further.
If I close Excel and re-open it again same thing is occurring.
I tried for the system restore option, but it was not having any restore point before this add-on was installed. I tried to repair Office but it came that it can't be repaired.
After that I tried to uninstall the whole Microsoft Office 2007 and reinstall it. But after so much time of displaying that boring MS logo, it was giving a dialog box with 'Microsoft Office Enterprise 2007 could not be unistalled due to some system errors. Please try again later.'
How can I get rid of this annoying 400 error. Please help me friends... :-(
P.S. I got a great lesson that never try any Add-on if you are not sure about how is it going to mess you up or how can you get rid of that mess if it messes you!