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Arduino UNO not working; Arduino: avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified. . I haI have also changed the COM Port in windows like the YT
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Win 11 avrdude: ser_open(): can't set com-state for "\\.\COM4" - Avrdude, stk500, Bootloader issues - Arduino Forum
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HowTo: Fix AVRDUDE 6.3/Arduino 1.6.10+ Compatibility Issues with USBasp Clones – Lincomatic's DIY Blog
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