Network-related programs no longer work after you upgrade to Windows 7


After you upgrade from an earlier version of Windows to Windows 7, or after you upgrade from one edition of Windows 7 to another edition, third-party network-related programs may no longer function.

You may experience this issue with programs such as virtual private network (VPN), antivirus, firewall, antispyware, or load balancing and failover (LBFO) programs.


This issue occurs if the third-party programs use any of the following Network Driver Interface Specification (NDIS) drivers:

  • NDIS intermediate (IM) filter driver
  • NDIS IM multiplexer (MUX) driver
  • NDIS protocol driver
  • NDIS Filter driver

During the upgrade, the third-party NDIS drivers that are mentioned in this section are not automatically migrated to Windows 7. In this situation, the driver file is present on the Windows 7-based computer. However, the driver is not installed in Windows 7. Therefore, the functionality that the driver provides is unavailable after you upgrade the computer to Windows 7.

Note NDIS miniport drivers can be automatically migrated to Windows 7.


To resolve this issue, reinstall the third-party program that has this problem.

We also recommend that you check for driver updates on the Web site of the program’s publisher. Make sure that you have the latest version of the driver.


Artikel-id: 968216 - Laatst bijgewerkt: 19 okt. 2009 - Revisie: 1