Presuming that when you say you "have a dell d531" you mean a Latitude D531 laptop, there are a number of different wireless drivers for that model, so that may not be the right one. Need to know a couple of things.
1. What operating system? Windows XP? Windows Vista? 32-bit? 64-bit?
2. To help us correctly identify the device so that we can pull the right driver, please do the following.
Right click on My Computer. Select Manage. Select Device Manager. In the right-hand window, choose a device that shows as Unknown or has a Yellow Exclamation mark. Click on the + next to it to expand on it. Right-click on it. Select Properties. Go to the Details tab. Select Device Instance Id. Click once on the string that looks like this: PCI\VEN_8086&DEV_1229&SUBS
YS_0070808
6&REV_10\4
&25296D99&
0&50F0
Press Ctrl-C to copy the string and Ctrl-V to paste it into a message here.
Do this for each device for which you need drivers.
See these instructions, which include screen shots, if you need more help with the process.
Finding Device Manager Name and Plug'n'Play (PnP) ID
http://www.lumanate.com/aspx/faqdevicemanagernamepnpid.aspx
