You receive a cannot deserialize the Web Part error message when you view the SharePoint Services home page
SYMPTOMSWhen you view the home page of a Microsoft Windows
SharePoint Services site, you may receive one of the following error messages:
Web Part Error: Cannot deserialize (convert an XML stream
back into an object) the Web Part on the server. Web Part Error: One of the properties of the Web Part has
an incorrect format. Windows SharePoint Services cannot deserialize the Web
Part. Check the format of the properties and try again. CAUSEThis issue may occur when permissions that Windows
SharePoint Services configured on the Windows Temp directory were
unintentionally reset , possibly when you upgraded your operating
system. RESOLUTIONTo resolve this issue, make sure that the following
permissions are configured correctly: Windows directory %WinDir%\Temp Administrators - Full Control SYSTEM - Full Control STS_WPG - Read, Write Network Service (for a domain controller only) - Read, Write %WinDir%\system32\logfiles STS Administrators - Full Control SYSTEM - Full Control STS_WPG - Read, Write Network Service (for a domain controller only) - Read, Write REFERENCESFor a detailed explanation of the minimum file permission
settings that must be in place for Microsoft Windows SharePoint Services to
perform as designed, view the Files and Permissions topic in
the Windows SharePoint Services Administrator's Guide. For information about how to obtain the Windows SharePoint Services Administrator's Guide, visit the following Microsoft Web site: Windows SharePoint Services Administrator's Guide (http://www.microsoft.com/downloads/details.aspx?FamilyID=a637eff6-8224-4b19-a6a4-3e33fa13d230&DisplayLang=en)
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