You do not say, so I shall presume your home PC is wired to your D-Link wireless router and working with internet access, etc.
1) Finish network set-up by setting security (esp for wireless connections)
> Change the default Router Configuration Page's password to one of your own
> Change the default SSID to one of your own
> Set wireless data traffic encryption on (preferably using WPA instead of WEP) and set as unique and as long a password as possible
2) Setup your common Workgroup & computer names
On both your home PC and (work?) laptop;
>Start >Control Panel >System - Computer Name tab ~ Change button
> Change the Default MSHOME to ShtWkGrp name
> Set a unique (but short) name for each computer
3) Check that your desktop is still connected ok and able to access the internet
4) Add a preferred wireless network connection on your Laptop
Start> Control Panel> Network Connections>
Right mouse-click on “Wireless Network Connections” and select “properties”.
Select the “Wireless Networks” tab.
REMOVE any “Preferred networks” entries you see in the box.
Then ADD a new “Preferred network” entry again.
Repeat your SSID, WPA (or WEP) selection and Passphrase setup.
Your laptop should now automatically find your own network and connect to it. (Make sure you are close to your router during setup to avoid poor radio transmission adding more confusion at this stage.)