support.dell.com Installing and Configuring SCSI Drivers 3-3 This section describes how to install or update the adpu160m.sys driver ifWindows NT is already installed. If you are installing Windows NT for the firsttime, see the section “Installing Windows NT and the Driver for the First Time”found earlier in this chapter.Perform the following steps only if Windows NT 4.0 is already installed:1. Click the Start button, point to Settings, and click Control Panel.2. Double-click the SCSI Adapters icon.3. Click the Driver tab and then click Add.4. Click Have Disk.5. Insert the Windows NT 4.0 driver diskette that you created into drive A.6. In the Copy Manufacturer's Files From: field, type a:\scsi\ and click OK.7. Select Adaptec AHA-294x/AHA-394x/AHA4944 or 78xx PCI SCSI Controller(NT 4.0). Then click OK.8. If the following message appears, click New to replace the existing driver:The driver(s) for this SCSI Adapter are already on the sys-tem. Do you want to use the currently installed driver(s) orinstall new one(s).9. If the following message appears, type a:\scsi in the dialog box and clickContinue:Please enter the full path to Adaptec's installation files.These files are located in the \scsi directory on the Windows NT 4.0 Driverdiskette.The driver is copied from the diskette to your system.10. Click Yes when prompted to restart the system and remove the diskette fromdrive A.After the system reboots, the new driver is active. Some drive letter assignments mayhave changed from the previous configuration.If you need additional assistance, see the section “Troubleshooting for Windows NT”found later in this chapter.