TechTips - How to Fix the Error 'Cannot Run Windows SharePoint Services on This Page'

I work a lot in SharePoint 2007 and it never ceases to amaze me that I find new errors almost daily with the program. This error is tied to the Multiple File Upload button, when my users try to use it they get an error stating:

Cannot run Windows SharePoint Services on this page

I searched around and found this is a common problem but none of the solutions on the internet fixed the problem for me. The most common solution states that the upload.aspx page has been edited and needs to be fixed. Well we didn't do anything to the page and none of the fixes worked for our situation. In this article I will explain what I did to fix the issue for my site when I was getting the error 'Cannot run Windows SharePoint Services on this page.'

The solution that worked for me was very simple, we did first try to over write our Upload.aspx page with another un-altered Upload.aspx page (although ours was never edited so we knew this wouldn't fix our problem but thought it wouldn't hurt to try). You can give this a shot if you have altered your Upload.aspx page but I don't think this is the true cause of the Cannot run Windows SharePoint Services on this page error.

So once I had tried the new Upload.aspx page fix and it didn't work then I got into Central Admin to play around to see if I could find a setting for the Multiple Upload button. I couldn't but I did find under Authentication Providers I had a failed web application (the one with the problem) so I went to the settings and started to play. After a few minutes I got it working and here are the steps:

Open Central Administration Webpage
Click Application Management Tab
Click Authentication Providers Link
Click Web Application Drop Down Box
Click Change Web Application
Click Web Application you want to modify
Click Default Link
Set Authentication Type to Windows (if already set leave)
Ignore Anonymous access (unless you need to make changes not needed to fix this issue though)
Set IIS Authentication to Integrated Windows and NTLM (unless your setup requires Kerberos)
Set Client Integration to No
Click Save
Click Default Link (AGAIN)
Set Client Integration to Yes
Click Save

Now you can test your site and the Multiple Upload Button, it should now work with no problems. You should probably do an IISRESET before you test the site just to make sure that you settings have been applied and replicated to the website.

Well I hope I have helped you to solve the Cannot run Windows SharePoint Services on this page error.