I have this problem too. I'm surprised no one has come up with a solution. Do D-Link provide any tech support through these forums? I'm running Windows 7 x64. No kapersky installed.
I have two of these USBs. One is H/W: vA1 F/W: v1.00. This one works perfectly fine and always has.
The second one is H/W: vA2 F/W: v1.31. This one is having the problems above. This used to work in Windows XP. Then I upgraded to Windows 7 HP and now it's kicking up a stink.
There are just so many permutations of things I've tried, including swapping, reinstalling, even formatting between 2 computers in the past 6 hours that I can't type it up. To summarise it has only worked on a clean format but if I try to uninstall and reinstall with the v1.31 I get back to square one.
There is also an added issue of when it is working, it gets very hot and dies for about 5 minutes before working again. I do not have this issue with the v1.00.
D-Link has not released any firmware for this product either so is there anyone out there who can help before I have to RMA?
Anyone out there have any ideas?
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Edit: I just uninstalled ZoneAlarm (firewall) and the adapter was able to connect. Once it had connected, I reinstalled ZoneAlarm and it is working fine now. I had the same setup in XP with zonealarm and that didn't create a conflict.