Event ID 5 — BITS Cleanup Task

Applies To: Windows Server 2008

BITS (Background Intelligent Transfer Service) Server limits the number of upload sessions that can exist concurrently for a user. If the number of sessions for a user is more than this limit, Task Scheduler is triggered to perform the BITS Cleanup task. Task Scheduler scans the directory and keeps the first number of sessions it encounters. When the number of encountered sessions equals the configured limit, the rest are deleted. By default, Task Scheduler is set to clean up every 12 hours, an interval that can be configured by the administrator.


Event Details

Product: Windows Operating System
ID: 5
Source: BITS Server Extensions
Version: 7.0
Message: BITS has encountered %2 error while scanning the virtual directory %1. The directory might not be available now. Try running Cleanup again later.


Check security permissions of the virtual directory

To resolve this issue, check the security permissions of the virtual directory:

To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.

  1. Ensure the directory corresponding to the vdir exists:
    • On the BITS Upload page, click the Content View tab at the bottom of the page.
    • Confirm the directory corresponding to vdir exists.
  2. Verify that the directory is not being used by any other program.
  3. Check security permissions on the directory corresponding to the vdir and ensure that the user has permissions to create or delete a directory. If not, then follow the directions given at the bottom of the page to resolve permission issues.
  4. Run CleanUp task again.
    • Click Default Web sites, click vdir, click the Features tab at the bottom of the IIS Manager screen. Click BITS Uploads .
    • Click Run CleanUp Task.


 To verify that the task scheduler has cleaned up all the stale data in BITS:

  1. Ensure that bitsmgr.dll is present in %windir%\system32.
  2. Open Task Scheduler. From the Start menu, right-click My Computer, and then click Manage. Click Task Scheduler.
  3. Verify that a task with name starting with BITS_{vdirname} exists.

BITS Cleanup Task

BITS Infrastructure