http://support.microsoft.com/default...b;en-us;302590
SYMPTOMS
When you attempt to install device drivers or utilities on your computer, you may receive the following error message:
VNETSUP.VXD, VREDIR.VXD, DFS.VXD... MSNP32.DLL - Unable to load the dynamic link library: MSNP32.DLL the System cannot find the specified file. Some, or all, of the following feature is not available: Microsoft Network.
CAUSE
This behavior can occur if your networking components are configured incorrectly.
RESOLUTION
To resolve this issue, remove and then reinstall Client for Microsoft Networks. To do this, follow these steps:
Click Start, point to Settings, and then click Control Panel.
In Control Panel, double-click Network.
In the Network dialog box, select Client for Microsoft Networks, and then click Remove.
In the Network dialog box, click OK, and then click Yes to restart your computer.
Repeat steps 1 and 2.
In the Network dialog box, click Add.
In the Select Network Component Type dialog box, click Client, and then click Add.
In the Select Network Client dialog box, click Microsoft under Manufacturers.
Under Network Clients, select Client for Microsoft Networks, and then click OK.
In the Network dialog box, click OK.
Click Yes to restart your computer.
NOTE: You may be asked to insert your network CD-ROM. If you do not have a network CD-ROM, contact your network administrator for your specific network settings.