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Cannot deserialize the Web Part – The fix

by Steve Wiseman on February 6, 2008 · 0 comments

in Windows


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I started getting that message when I moved our internal SharePoint server from a physical machine to our VMWare server.

Web Part Error

We have made lots of customizations to Sharepoint – so when ever we touch the thing it creates headaches. We were getting this message for *all* web parts, so I knew it couldn’t be a specific issue with just one of them.

After searching around for a while I found a very easy fix:

http://support.microsoft.com/kb/826786

Essentially you need to give the local group named STS_WPG permission to write the the C:\Windows\Temp folder.

STS_WPG Permissions

After I did that, I refreshed the Sharepoint website and it was working fine again.

How did it lose this permission? Well after we moved the Sharepoint server we had to run windows repair (VMWare had a different set of hardware). This resets the permission on this temp folder.

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