# USB PRO 900HB not working on Win 7 - Unknown Device

**URL:** <https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453>\
**Category:** Edgeport\
**Tags:** usb, windows-7, xbee-900hp\
**Created:** [September 24, 2015, 2:48pm UTC](https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453 "2015-09-24T14:48:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![JPelletier](https://avatars.discourse-cdn.com/v4/letter/j/d9b06d/32.png) [@JPelletier](https://forums.digi.com/u/JPelletier)\
**Post date:** [September 24, 2015, 2:48pm UTC](https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453/1 "2015-09-24T14:48:37Z")

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Hi,

I received the XBEE PRO 900HP dev kit, it works fine on our Surface Pro 3 tablet (Win 8.1) but when I plug it in my Windows 7 T450s laptop it doesn’t work. I always get “Unknown Device”.

I installed the Digi\_USB\_RF\_Drivers.exe, even tried to manually select the driver without success

Thanks for help

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<div class="post-metadata">

**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [September 25, 2015, 2:42pm UTC](https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453/2 "2015-09-25T14:42:42Z")

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Try powering from an external power source.

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<div class="post-metadata">

**Author:** ![JPelletier](https://avatars.discourse-cdn.com/v4/letter/j/d9b06d/32.png) [@JPelletier](https://forums.digi.com/u/JPelletier)\
**Post date:** [September 28, 2015, 9:02am UTC](https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453/3 "2015-09-28T09:02:31Z")

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Not working either

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<div class="post-metadata">

**Author:** ![JPelletier](https://avatars.discourse-cdn.com/v4/letter/j/d9b06d/32.png) [@JPelletier](https://forums.digi.com/u/JPelletier)\
**Post date:** [September 28, 2015, 9:07am UTC](https://forums.digi.com/t/usb-pro-900hb-not-working-on-win-7-unknown-device/15453/4 "2015-09-28T09:07:05Z")

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Initially I had Kaspersky Antivirus on my laptop and I removed it because it seemed to be the cause of my problems.

Unfortunately it didn’t solved my issue but this morning I tried to connect another board from my Dev Kit and this one is detected and installed correctly!