This problem may occur if download managers (such as Download Express or GetRight) are installed on the computer. Download managers may affect the ability of MBSA to download the Mssecure.cab security update. MBSA does not download the Mssecure.cab security update if MBSA calls the URLDownloadToFile() API from a COM object.
When you install download managers on your computer, protocol namespace handlers are installed in the registry. The MBSA call to the API is not successful if MBSA calls from a COM object when protocol namespace handlers are installed in the registry.
Note To verify whether namespace handlers are installed in the registry, follow these steps:
- Click Start, click Run, and then type regedit in the Open box.
- On the Edit menu, click Find, type Name-Space Handler in the Find What box, and then click Find Next.
- Expand the Name-Space Handler key, and then look for the following key: HKEY_CLASSES_ROOT\PROTOCOLS\Name-Space Handler\http.
To work around this problem, remove the download managers that are installed on the computer, and then download the Mssecure.cab security update.