I have been creating a vsto 2007 excel add in inside of Visual Studio 2010 and .net 4.  It works fine when I run it from the debugger, but when i try to use the .vsto file to try install it, I get the following error:

The following Microsoft Office solution cannot be installed due to a general installer error: Aeci.QueryHelper.vsto.

0x80131604

This error was isolated to my machine, but I was having others test it on their machine.  It would install but it would Fail to load inside excel.  When they uninstallled the add in, and tried to run the .vsto, they are now getting my error.  We are using ClickOnce and publishing it to IIS. 

Any Ideas

 Hi Bob,

In addition to what Sidharth requested, can you check the Properties of Application event log.

Start -> Run -> Eventvwr -> Right click on Application and select Properties.

By default the Log is setup to "Overwrite events as needed" which means that you get an infiniate log, and when new events come oldest events will be overwritten.

Do you have "Overwrite events as needed" selected or "Do not overwrite events" selected?

我点击清除日志按钮就解决问题了。 

Thanks,

Navneet