Before running the Installation from the Setup CD, make sure to disable your Anti-Virus software.
D-Link´s network utility will be un-trusted and may result as incomplete installation. Anti-Virus software widely affects network installations, so looking into it may very well solve your issue.
Step 1: Before starting, make sure to have the downloaded and uncompressed package, which contains a folder of drivers.
Note: To perform a manual installation, you will need to access the device manager.
Step 2: In the Start menu, right-click on Computer to select Manage.
Step 3: On the left, select Device Manager to bring it up on the right.
Note: If the Driver software has not installed correctly, the partially installed adapter will come up in the Other devices group, just as it is shown in the previous image. The adapter may have acquired the inappropriate driver, which would be identified with an exclamation mark on the icon within the Network adapters group.
Step 4: Right click on the unknown adapter to Update Driver Software.
Step 5: Click on Browse my computer for driver software.
Step 6: Click on the Browse.. button to get to the new driver.
Step 7: Select the folder location for the files identified in step 1 and click on the OK button.
Step 8: Make sure to have selected the correct model and version. Click on Next to initiate the search and installation.
Step 9: The wizard should notified that it successfully install the new driver. The window can now be closed.
Step 10: Once the adapter is listed within the Network adapters, the installation would have succeeded completely.
Step 11: For Wireless Products, click/Right click on the Network Icon located on the system tray to View the Available Wireless Networks. Find your personal Network and double click to connect. It should request for a wireless key, which by now should have been set up.