Windows x64 and non working USB ports


OSNN Veteran Addict
Mar 18, 2002
Its taken me a little while to track this down, but I've found other reports on the web as well, especially related to the Asus A8N32-SLI motherboard that I have.

If you install any software which uses SCSI Pass-Through Device (SPTD) drivers you may experience USB ports which just wont work at all.

Software which uses these drivers is things like Alcohol 120% and Daemontools. The SPTD drivers somehow I am not completely sure block the proper initialisation of the Standard OpenHCD USB Host Controller almost consistently in Windows XP Pro x64. I believe Duplex Secure are aware of the problem though I don't know how a fix is progressing. At time of writing the latest public beta is 1.40 and this did not fix the issue for me.

I've just removed Alcohol 120% and SPTD from my desktop and all my USB devices are working for it now.

Hope this information helps someone else, the information is there already on the net albeit scattered across a range of locations.

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Perris Calderon wrote on Electronic Punk's profile.
Hey ep!

All good with me, applying for microsoft mvp right now, should have done this a while ago.

Notifications don't work, I only found your response by comming back to hunt up some threads, if you want, give me your email address so we can keep in touch easier, mine is perriscalderon at gmail
Perris Calderon wrote on Electronic Punk's profile.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS

Been running around Quora lately, luv it there
Electronic Punk wrote on Perris Calderon's profile.
All good still mate?
Hello, is there anybody in there? Just nod if you can hear me ...

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