USB Connection Window does not open


I urgently need help:
When I want to connect a device (Arduino) to our school computers, the USB connection window does not open.
At home it works perfectly (no matter which device) -> see picture.
It doesn’t work on the school computers even if I’m logged in as admin.
The problem only appears in the offline version of mBlock. The online version works without any problems.
Is it a driver problem? Do I have to enable certain rights here? And if so, which ones, or what else could it be?

Thanks for your help!


Could be a security policy blocking USB ports. Perhaps ask whoever manages your computer network and policies?


I think I already replyed you on mail,regarding to the connection issue,you can install the driver CH340 to check if connection issue can be fixed or not.for details you can check on this link.


Thank you for your help.
It was the firewall


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.