Installation of Service Pack 1 for Windows 7 fails with errors 0x8004a029 or 0x80004005 - E_FAIL

Applies to: Windows 7 EnterpriseWindows 7 Home BasicWindows 7 Home Premium


An installation of Service Pack 1 (SP1) for Windows 7 may fail and return either of the following error codes:

0x80004005 - E_FAIL Unspecified error



This problem can occur if the number of installed network filter drivers exceeds the specified limit. By default, Windows 7 has a limit of 8 and a maximum allowable limit of 14.


To have us resolve this problem for you, go to the "Fix it for me" section. If you prefer to fix this problem yourself, go to the "Let me fix it myself" section.

Fix it for me

To fix this problem automatically, click the Fix it button or link. Then click Run in the File Download dialog box, and follow the steps in the Fix it wizard.

  • This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
  • If you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.

Then, go to the "Did this fix the problem?" section.

Let me fix it myself

To resolve this problem, adjust the value of the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\ registry subkey. To do this, follow these steps:
  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate and then click the following registry subkey:
  3. In the right pane, right-click MaxNumFilters, and then click Modify.
  4. Select the Base Decimal option, change the value to decimal 14, and then click OK.

    Note The default value is 8, and the maximum value is 14.
  5. Close the Registry Editor.
If more than 14 filter drivers are installed on your computer, you cannot resolve this problem by changing the registry subkey in step 2. In this case, remove some of the installed filter drivers to let the service pack installation succeed. You can remove network filter drivers from the properties of the network connection in the Network Connections item in Control Panel (Ncpa.cpl).

Note Do not remove the default Microsoft network filter drivers, such as Client for Microsoft Networks, QoS Packet Scheduler, File and Printer Sharing for Microsoft Networks, or any of the included Internet Protocol entries. Third-party network filter drivers can include firewalls, QoS software, and network virtualization software.

Did this fix the problem?

  • Check whether the problem is fixed. If the problem is fixed, you are finished with this section. If the problem is not fixed, you can contact Microsoft Support.
  • We would appreciate your feedback. To provide feedback or to report any issues with this solution, please leave a comment on the "Fix it for me" blog or send us an email message.