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"The VPN client driver has encountered an error"

The following screen messages may appear when this problem occurs:

(These on a Windows XP Home Edition system)

  1. The VPN Client Driver Error

  2. AnyConnect unable to establish a connection



The information below was related to a corrupt driver database and was fixed by renaming and deleting the affected catroot2 directory. The information below is copied from the Cisco website.

AnyConnect: Corrupt Driver Database Issue

This entry in the SetupAPI.log file suggests that the catalog system is corrupt:

W239 driver signing class list "C:\WINDOWS\INF\certclas.inf" was missing or invalid. Error 0xfffffde5: Unknown Error., assuming all device classes are subject to driver signing policy.

You can also receive this error message:
Error(3/17): Unable to start VA, setup sharedqueue, or VA gave up shared queue.

And this log on the client:
"The VPN client driver has encountered an error"

Repair

This issue is due to Cisco bug ID CSCsm54689. In order to resolve this issue, make sure that Routing and Remote Access Service is disabled before you start AnyConnect. If this does not resolve the issue, complete these steps:

  1. Open a command prompt as an Administrator on the PC (elevated prompt on Vista).

  2. Run:
    net stop CryptSvc

  3. Run:
    esentutl /p %systemroot%\System32\catroot2\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\catdb

  4. When prompted, choose OK to attempt the repair.

  5. Exit the command prompt.

  6. Reboot.

If Repair Fails

If the repair fails, complete these steps:

  1. Open a command prompt as an Administrator on the PC (elevated prompt on Vista).

  2. Run:
    net stop CryptSvc

  3. Rename the %WINDIR%\system32\catroot2 to catroot2_old directory

  4. Exit the command prompt.

  5. Reboot.

Analyse the Database

You can analyse the database at any time in order to determine if it is valid.

  1. Open a command prompt as an Administrator on the PC.

  2. Run:
    esentutl /g %systemroot%\System32\catroot2\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\catdb

Refer to Microsoft Technet for more information.