Open the Device Manager, and check the driver details for the "Generic USB Hub"; copy down the names of all the files listed there. Some of them will probably be files provided by Microsoft, but the others should be Lexmark files. Be sure to copy the names of all the files listed there, then close the Device Manager.
Next, right-click the Desktop, point to New, click Folder, type OLDINF, and then press ENTER.
Now, click Start, click Run, type INF in the Open box, and then click OK. This will open the Windows\INF folder.
Look through the INF folder for the files you saw listed in the Device Manager, and use drag-and-drop to move them into the OLDINF folder you created on the Desktop. By doing this, you will prevent Windows from automatically installing the drivers the next time you reboot the system. Sadly, Windows doesn't always find ALL the driver files it needs to install hardware, and I suspect that is what is happening to you. Using this method will force Windows to redetect your Lexmark hardware at bootup, which will give you the chance to MANUALLY install it; that is the ONLY way you can be sure all of the driver files get installed at once.
Now, shutdown your computer. Be SURE the printer is plugged into a USB port and turned on BEFORE you reboot the system; you should see a lighted power button on the top of the printer.
Next, reboot the system. Windows should detect the printer and start the Add New Hardware Wizard to install it, but CANCEL ALL of the Add New Hardware Wizard screens; do NOT install the printer yet.
Once you are back at the Desktop, insert the CD that came with the printer into the optical drive; the CD should auto-run and load the program to properly install the printer. Be prepared to reboot your system one more time to get everything working properly.
If you don't have the CD, download the Lexmark Windows 98/ME All-in-One driver for your printer / scanner from the Lexmark website; save it to the Windows Desktop. When the driver has finished downloading (it is a LARGE file, so the download might take a while), close the browser and double-click the file to begin the installation. Be SURE you download the right file for your hardware and OS...
http://www.lexmark.com
FWIW, do NOT get into the habit of installing and removing the USB cable while the Lexmark printer is turned on; wait until your computer is shut down before you install or remove the USB cable. All previous claims to the contrary, most USB devices do NOT work well when users try to hot-swap them. You'll avoid a lot of headaches if you simply remember to shutdown the computer before you turn the printer on or off, and don't unplug the USB cable if the printer or computer are turned on.
When you are finished with this, and everything seems to be working properly, do this:
1. Double-click the OLDINF folder on the desktop, and then click Select All on the Edit menu.
2. On the Edit menu, click Copy, and then close the OLDINF folder.
3. Click Start, click Run, type INF in the Open box, and then click OK.
4. On the Windows\INF folder Edit menu, click Paste, and click No or No to all if you are prompted to overwrite any files.
5. Close Windows Explorer, then reboot the system.
After you've used the computer for a few weeks, and you're convinced that everything is working properly, you can delete the OLDINF folder you created on the Desktop. If you have problems, don't delete the folder; having those old files handy might save you some time if you have to repeat this procedure.
Good luck; let us know if you have any problems. Take your time when you do this; read these instructions a few times so you understand what you're trying to accomplish. This might seem like a complicated way to install your hardware, but Windows doesn't always get the installation details right. Windows MANAGES hardware a lot better than it installs or uninstalls it... so this method should allow you to get everything working properly, and keep Windows from interfering with the installation process.
