I've had issues when AV has interfered. Try disabling AV protection before updating the share.
From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On Behalf Of Yash shah Sent: Tuesday, July 16, 2013 4:48 PM To: mdtosd@lists.myitforum.com Subject: [MDT-OSD] Re: MDT 2012 update deployment share error Hi, Does any one know,How to fix following error message "Unable to mount the WIM, so the update process cannot continue"? === Making sure the deployment share has the latest x86 tools === === Processing LiteTouchPE (x86) boot image === Building requested boot image profile. Determining if any changes have been made in the boot image configuration. No existing boot image profile found for platform x86 so a new image will be created. Calculating hashes for requested content. Changes have been made, boot image will be updated. Windows PE WIM C:\Program Files (x86)\Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\x86\en-us\winpe.wim will be used. Unable to mount the WIM, so the update process cannot continue. === Completed processing platform x86 === === Making sure the deployment share has the latest x64 tools === === Processing LiteTouchPE (x64) boot image === Building requested boot image profile. Determining if any changes have been made in the boot image configuration. No existing boot image profile found for platform x64 so a new image will be created. Calculating hashes for requested content. Changes have been made, boot image will be updated. Windows PE WIM C:\Program Files (x86)\Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\en-us\winpe.wim will be used. Unable to mount the WIM, so the update process cannot continue. === Completed processing platform x64 === === Processing complete === Regards, Yash