USB modem installed with wrong drivers for the OSIf the USB modem is installed with the Win 98/ME drivers in Windows 2000/XP, you will need to do the following:
Run a Find or Search of the main drive (usually c:\) for "MCCI" (without the quotes). DELETE all files containing MCCI in their name. There are nine of them:
Next go into the Winnt\INF* or Windows\INF* and perform a Find or Search for "atlas" in the 'Containing Text' box. This will likely show you an OEMx.INF file (the x represents a number). Delete this file.
Now go to the Phone and Modem option in the Control Panel and Remove the USB modem. Reboot the system and install with the correct drivers.
If you have installed the USB modem with the Win 2000/XP drivers in Windows 98/ME, you will need to do the following: Open Windows Explorer and navigate to the Windows\INF\Other* folder and Delete any files with your USB product name or MDMMTUSB. Next open the Control Panel Modem icon and Remove the USB modem. Reboot and install with the correct drivers.
* If you cannot see this folder:
1) First open Start | All Programs | Accessories | Windows Explorer
2) Then choose Tools | Folder Options and select the View tab
3) Check the "Display the contents of system folders" option and also under Hidden files and folders, select the "Show hidden files and folders" radio button. Just below that, uncheck the "Hide extensions for known file types".