1.    In Device Manager, find the device you want to uninstall, this is usually under Multi-port serial adapters.
      Right-click on the device and select Uninstall (see Figure 1).     
                                                                
                                                                                                                                    Figure 1

2.   Open Windows Explorer by right clicking on the Start button and selecting Explore.  Locate the \WINNT\inf  directory. 
      You will need to remove the following files:

 digirp.inf
 digirp.pnf
 digirprt.inf
 digirprt.pnf

3.   Now locate the oem#.inf and oem#.pnf files (see Figure 2).
     
                                                                                                                         Figure 2

4.    Double-click on each OEM#.INF file and verify the files contains Digi RealPort in it (see Figure 3).
       Any OEM#.INF file with Digi RealPort in it, will need to be deleted as well, along with the associated OEM#.PNF file.
       FOR EXAMPLE: Here we will delete oem1.inf, and oem1.pnf.
      
                                                                                                                           Figure 3

5.    In systems that have the original RealPort driver that was built into the Windows 2000 CD (Version 2.0.0.0), 
      you will need to remove the following files from the \WINNT\system32\ directory:

      digirlpt.dll
      dgrpsetu.dll

6.    In the \WINNT\system32\drivers directory find and delete digirlpt.sys.

7.   At this point you have successfully removed the Digi RealPort Driver.

8.   If you want to reinstall the driver, go to www.digi.com and download the latest driver.

9.   Extract the driver and you will see a file called DGRPCLN.cmd.  Execute this file and you will see a command box 
      pop up and disappear.

10. Now go to Control Panel, Add/Remove Hardware Wizard and select Add/Troubleshoot a device.

11.   Select Add a New Device and click Next.

12. Select No, I want to select the hardware from a list option (see Figure 4).  Click Next.
     
                                                                                                                Figure 4

11.   Select Multi-port serial adapters (see Figure 5).  Click Next.
      
                                                                                                                    Figure 5

12.   Click on the Have Disk button and browse to the location where you have downloaded and extracted the driver from our web site
        (www.digi.com) and select digirp.inf (see Figure 6).
       
                                                                                                                                Figure 6

13.   Click on the Open button and then click OK on the next screen that confirms the driver path.

14.   Select the appropriate Digi device from the modules list (see Figure 7).
      
                                                                                                                     Figure 7

15.   Click Next and Next again to go with the default hardware settings.

16.   Click Yes to the Digital Signature not found message box.  It will copy some files, and then ask 
        for the IP address of the device.  Enter the appropriate values and click Next (see Figure 8).
       
                                                                                                           Figure 8

17.   Give the device any name you would like and specify the number of ports you wish to configure 
        at this time (see Figure 9).  Click Next.  NOTE: For the device name it maybe helpful if you 
        have multiple devices to give each device a unique name so it is easily identifiable.
        |
                                                                                                              Figure 9