Data corruption may occur on a computer that has Microsoft Forefront Client Security (FCS) installed. When this data corruption occurs, you may experience the following symptoms.
In this situation, the Web site configuration cannot load, and the following information is logged in the IIS log:
Symptom 1
If you upload a file to a Microsoft Office SharePoint Server site or to a Web Distributed Authoring and Versioning (WebDAV) site, the uploaded file may be corrupted. This symptom occurs at random times. It may occur with any file types and with any file name extensions. The corrupted files may contain additional zeros at the end of the file or at write-page boundaries.Symptom 2
The Applicationhost.config file may be corrupted on a computer that is running Internet Information Services (IIS) 7.0. This symptom occurs at random times. It is likely to occur when you change IIS configurations for a Web site. The corrupted file may contain additional zeros at the end of the file or at write-page boundaries. Or, the file may be truncated.In this situation, the Web site configuration cannot load, and the following information is logged in the IIS log:
8:56:16 PM [ERROR] Unable to IISAddVirtualDirectory. ERROR: Error adding virtual directory ' server1' to W3SVC '2904452': The data is invalid.
8:56:16 PM [ERROR] Unable to add account filter. ERROR: Exception adding ISAPI filter, DomainMapper, to Metabase path, W3SVC/2904452: The data is invalid.
Symptom 3
On a Windows Server 2008 computer that runs Hyper-V, when you use the New Virtual Machine Wizard to create a virtual machine, the operation fails. Additionally, you receive the following error message:The server encountered an error while configuring memory on the New Virtual Machine. Wizard Failed in rolling back the created virtual machine. Please delete it manually afterwards.
Failed to add device 'Microsoft Synthetic Ethernet Port'
The Virtual Machines configuration GUID at 'C:\Program Data\Microsoft\Windows\Hyper-V' is no longer accessible: The requested operation cannot be performed on a file with a user-mapped section open. (0x800704C8)
Failed to add device 'Microsoft Synthetic Ethernet Port'
The Virtual Machines configuration GUID at 'C:\Program Data\Microsoft\Windows\Hyper-V' is no longer accessible: The requested operation cannot be performed on a file with a user-mapped section open. (0x800704C8)