# USB Com ports used by other programs

**URL:** <https://forums.digi.com/t/usb-com-ports-used-by-other-programs/21733>\
**Category:** USB\
**Tags:** xbee\
**Created:** [September 1, 2020, 1:59pm UTC](https://forums.digi.com/t/usb-com-ports-used-by-other-programs/21733 "2020-09-01T13:59:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rjberry](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@rjberry](https://forums.digi.com/u/rjberry)\
**Post date:** [September 1, 2020, 1:59pm UTC](https://forums.digi.com/t/usb-com-ports-used-by-other-programs/21733/1 "2020-09-01T13:59:31Z")

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I am trying to program some XBEE S2C modules. everything was fine yesterday but now when i connect and try to use xctu i get the error that the com port is being used by another program. I have restarted my laptop, uninstalled old com ports, tried different boards (using the groove xbee dev ones) nothing works and i really need to get some testing done. right now it feels like i need to buy a new laptop as everything is broken. (its not an old laptop just cant get windows to behave)  
please help!  
Rob Berry

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**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 1, 2020, 2:01pm UTC](https://forums.digi.com/t/usb-com-ports-used-by-other-programs/21733/2 "2020-09-01T14:01:08Z")

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You could try reloading the USB drivers for the boards you are working with.