Consider the following scenario:
- You create a new default user profile and enable it.
- A new user logs on by using a profile that is created from the default profile on a Windows 10 or Windows Server 2016-based computer.
In this scenario, you encounter one or more of the following issues:
- Desktop icons take a long time to appear.
- Performance is poor when you start or browse in Internet Explorer or Microsoft Edge.
- ESENT errors like the following are recorded in the Event Log:
WebCacheLocal: "Database recovery/restore failed with unexpected error -1907"
Note The full event log message may also indicate an association with a different user folder location, such as "C:\Users\Administrator".
This issue occurs because the default user profile includes a locked copy of another user's cache database.
When the new user logs on to the computer, the default user profile content is incorporated into their new profile. As the Windows shell and desktop begin to load, the database can't be fully initialized for use. Applications that use the database likely experience negative performance or report errors.
To fix the issue, following these steps:
Log on to each affected computer by using an account that has administrative credentials, and then delete the following hidden file and folder if they exist:
File: C:\Users\Default\AppData\Local\Microsoft\Windows\WebCacheLock.datFolder: C:\Users\Default\AppData\Local\Microsoft\Windows\WebCache
For each user account on the computer, make sure that the user is logged off completely and the profile has unloaded fully, and then delete the following hidden file and folder if they exist:
File: C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCacheLock.datFolder: C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCache
Note <affectedUserFolder> is a placeholder for the user profile folder name. For example, for the Administrator user account, the folder is under C:\Users\Administrator. You must remove the files and folders for each user account on the computer.
How to view hidden files
To view hidden files, follow these steps:
- In Windows Explorer, select File, and then select Options.
- On the View tab, select the Show hidden files, folders, and drives option.
- Unselect the Hide protected operating system files (Recommended) option, and then click OK.
Because the cache database is designed to be generated per-user at the time of initial log on to an individual computer, Microsoft does not recommend or support the inclusion of the cache database in the default or any other user profile that is intended to be used as a template.