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PCI USB 2.0 Controller - Not Recognized on Win7

by lemaech56 / October 27, 2013 2:21 PM PDT

Having run out of USB 2.0 ports, I installed a 4 port controller in a free PCI slot on ABIT IP35 Pro (LGA775) MB. OS is Win7 SP1 32-bit. Win7 doesn't recognize the card and flags it as an Unknown Device (Code 28: Drivers for this device are not installed). No software came with the USB controller. Also, doesn't Win7 natively support USB 2.0 devices. While this isn't my main system, it is my storage host.

Thanks for any tips to solve this issue.

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Yes and no
by Jimmy Greystone / October 27, 2013 11:52 PM PDT

Yes and no. Yes Windows 7 natively supports USB 2.0, but it may not necessarily support some random PCI card which happens to have USB ports on it.

Go to the website of the company that makes the PCI card and check for any downloadable drivers from them and/or troubleshooting steps. I've found a lot of times people will buy the cheaper "OEM" versions of products which don't come with the usual assortment of software found with the retail versions. People just look at the cheaper price and don't dig deep enough to figure out that you're only getting the hardware in an anti-static bag, nothing else.

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RE: PCI USB 2.0 Controller - Not Recognized on Win7
by lemaech56 / October 29, 2013 2:55 PM PDT
In reply to: Yes and no

I purchased a retail version controller that was in a box and had a 4 star rating. It didn't come with driver software. The package said "no software required." Silly me to fall for 4 stars and no software claim. I have < $40.00 invested, so I will bypass PCI and purchase a USB 3.0 PCIe x1 controller. They all have driver software and an external power connection (Molex or SATA). Thanks for responding.

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Yes and no.
by R. Proffitt Forum moderator / October 28, 2013 1:46 AM PDT

While USB 2.0 is in 7 SP1, the drivers for motherboard, card and USB devices are most of the time not included in Windows.

Remember this has been this way with Windows since the beginning (1995 and prior) so not much I can add except you do the usual motherboard chipset install and hope.

There is a rare issue when a board runs out of some signals but that's so rare that I just mention in passing as the ABIT looks new enough to not have that issue.

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RE: PCI USB 2.0 Controller - Not Recognized on Win7
by lemaech56 / October 29, 2013 3:01 PM PDT
In reply to: Yes and no.

Yes. I did the usual prep. I've decided to go the USB 3.0/PCIe x1 controller route. All of the cards have driver software and a receptacle for external power. That should take a load off of the MB. Thanks for responding.

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RE: PCI USB 2.0 Controller - Not Recognized on Win7
by lemaech56 / November 3, 2013 9:33 AM PST
In reply to: Yes and no.

I did the following upgrades to my Win7 SP1 32-bit system - Abit Pro-35 LGA775 MB:

1. Replaced non-working USB 2.0 4-port PCI controller with StarTech controller with similar features. New card installed in same PCI slot from which original card was removed.

2. Installed Sabrent CP-4PTU PCIe 2.0 x1, 4-port USB 3.0 controller. Power was directly from Antec Trio 650 W PSU via Molex cable.

3. Replaced XFX Geforce 8500 GT PCIe 2.0 x16 Video card with Zotac Geforce GT 520 PCIe 2.0 x16. Same PCIe 2.0 x16 slot was used. No external power was needed by either card.


1. StarTech USB 2.0 controller still flagged by Device Manager as an unknown device ("Drivers for this device are not installed - Code 28)."

2. Using CD furnished with Sabrent USB 3.0 controller card attempts to load drivers failed with message: "Sorry, the install wizard can't find the supported hardware in your system... Press ok to terminate install wizard."

3. Installation was successful and completely automatic. The Zotac graphics card was supported by basic Windows display drivers afgter initial boot. Soon after the NVIDIA panel ran and linked the card to the NVIDIA drivers already installed at latest revision. After rebooting, the monitor was configured as expected. This case is included only as a reference.

I've contacted both StarTech and Sabrent for assistance. Both state that their products work with Win7 32-bit and 64-bit.

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by R. Proffitt Forum moderator / November 3, 2013 10:20 AM PST

I see I mentioned the usual so it's time to find a local guru to go over the machine. Or just reload the OS per the maker's instruction.

Again I see above I noted what I do but your reply failed to do that. This is why I think you need help from your support instead of a forum.

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RE: PCI USB 2.0 Controller - Not Recognized on Win7
by lemaech56 / November 3, 2013 3:00 PM PST
In reply to: Sadly

Sorry, Bob. I got carried away mentioning the changes I made and didn't report that all available outdated Abit Pro35 MB drivers found (19) were upgraded with no errors, and the system rebooted successfully. So, I'm out of ideas. Note also that I built this systems in 2009.

Thanks for the advise you have offered on this forum. It has improved my system skills, but I'm hardly an expert.

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I recant, undo and try one more thing.
by R. Proffitt Forum moderator / November 4, 2013 12:13 AM PST

Now that I know you tried the MB drivers there are only a few items left in my bag before I call that a bad board.

I would try it in other slots as older boards did odd things. I don't want to regale you with stories about audio cards next to video cards, etc.

Then I'd boot up a LIVE CD such as Ubuntu (no install required) to see if the card works in another os.

Finally I'd be trying this card in another PC.

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by / September 28, 2015 9:11 PM PDT

I know this was years ago, but I see the OP is still active on these forums. Were you able to get the SABRENT USB card to work for you? I just picked up the same PCIe card and I'm having the exact same results you describe. Would love to know if you discovered a solution (I'm still using Windows 7).


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