Slow logon with a blank screen in Windows 7 or Windows 8.1

Summary
In Windows 7 or Windows 8.1, Remote Desktop and console users experience a slow logon with a blank screen before the desktop is eventually rendered. Longer logon times directly correspond to the number of desktop shortcuts that are defined in the user’s profile.
Symptoms
In this situation, you may notice that the logon times increase continually. A blank screen may be displayed during this delay period. You may also notice that Explorer.exe consumes excessive CPU resources. 

Additionally, Procmon shows that affected computers are busy accessing the following registry key:

HKEY_CURRENT_USER\S-1-5-21-xxxxxxx\Software\Microsoft\Windows\CurrentVersion\UFH\SHC

You may also notice frequent changes or additions to shortcuts on the desktop. This might occur if you use a logon script to update the desktop or in a Remote Desktop situation in which the cached profile is deleted. This makes all entries new on the next logon.
Workaround
To work around this issue, configure a logon script to delete the following registry key during logon:

HKEY_CURRENT_USER\UserSID\Software\Microsoft\Windows\CurrentVersion\UFH\SHC

Note The UserSID placeholder represents the SID of the user, such as S-1-xx.

You can also use Group Policy preferences to work around this issue. 

Note There's a known issue when you use this workaround. As soon as the script is in place, users will see entries on the Start menu marked as “new” even though there aren't any newly installed applications or items. It might be a good idea to share this information with users to prevent them from logging a call with the Service Desk about this.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
Properties

Article ID: 3161390 - Last Review: 05/27/2016 17:06:00 - Revision: 1.0

Windows 8.1, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 7 Enterprise, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows 7 Home Basic

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