FIX: Cannot Run Windows SharePoint on this page during Multiple File Upload

An error while trying to multiple file upload to SharePoint 3.0? This could be do to a modified upload.aspx page. Although ours was not customized, it did have a modified date that was post-install, so perhaps a service pack or hotfix altered it.

To fix:

1. In the _layouts hive, find the file upload.aspx.
2. Make a backup copy and open the original.
3. Search for the line:
   <input TYPE="hidden" NAME="_charset_" VALUE="utf-8"><!--webbot bot="FileUpload" endspan i-checksum="45034" -->
   
4. Replace it with:
   <input TYPE=”hidden” NAME=”Cmd” VALUE=”Save”><!–webbot bot=”FileUpload” endspan  –>
5. Save the file.
6. Restart the web application pool for your site. I prefer this over a server wide IISReset, but if that’s your bag, you can always do that.