This article has been archived. It is offered "as is" and will no longer be updated.
Source: Microsoft Support
RAPID PUBLISHING ARTICLES PROVIDE INFORMATION DIRECTLY FROM WITHIN THE MICROSOFT SUPPORT ORGANIZATION. THE INFORMATION CONTAINED HEREIN IS CREATED IN RESPONSE TO EMERGING OR UNIQUE TOPICS, OR IS INTENDED SUPPLEMENT OTHER KNOWLEDGE BASE INFORMATION.
When performing an in-place upgrade from Windows XP or Windows Vista RTM to Windows Vista Service Pack 1, the upgrade will take a long time to complete if files are present in the Offline Files cache. This can occur if the following is true:
Offline files is enabled on the client with a large number of files in the cache.
IPSec is enabled for network communication.
The in-place upgrade is performing an Offline Files migration which fails on each file processed. The process waits until the timeout is hit for each file represented.
To workaround this problem perform the following steps:
Synchronize the offline data using Sync Center or Sync button in Explorer.
Disable offline files or disconnect the computer from the network. Disabling offline files is done by de-selecting Enable Offline Files from Folder Options, Offline Files tab.
MICROSOFT AND/OR ITS SUPPLIERS MAKE NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY, RELIABILITY OR ACCURACY OF THE INFORMATION CONTAINED IN THE DOCUMENTS AND RELATED GRAPHICS PUBLISHED ON THIS WEBSITE (THE “MATERIALS”) FOR ANY PURPOSE. THE MATERIALS MAY INCLUDE TECHNICAL INACCURACIES OR TYPOGRAPHICAL ERRORS AND MAY BE REVISED AT ANY TIME WITHOUT NOTICE.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, MICROSOFT AND/OR ITS SUPPLIERS DISCLAIM AND EXCLUDE ALL REPRESENTATIONS, WARRANTIES, AND CONDITIONS WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO REPRESENTATIONS, WARRANTIES, OR CONDITIONS OF TITLE, NON INFRINGEMENT, SATISFACTORY CONDITION OR QUALITY, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE MATERIALS.