Sarah, Try downloading and installing this, i believe this should work for 32Bit and 64Bit OS. Dell Wireless 1450 (802.11a/b/g) USB2.0 Adapter Let me know if you have any problems.
Hi, is there anyone out there with answer? Someone has already asked this last year, but no replies. I connected with TALK TALK yesterday and had to call technical support, as my wireless connection was showing up. With internet settings changed I can obviously connect.   But because I ca, Using DELL WIRELESS 1450 WIRELSS USB ADAPTER I HAD TO re-run disc that originally came with the adapter.But i am now getting a message telling me: that there is a known Program Compatibility issue and that Dell SingleSource 802.11 WLAN is incompatible with this version of Windows (Vista). Does this matter - is there a version which Is compatible? No solution is found when I select: find solution on-line???? Thanks Sarah  
DELL WIRELESS 1450 WIRELSS USB ADAPTER - Program Compatibility issue and that 
Dell SingleSource 802.11 WLAN