Arduino: 1.8.5 (Windows 10), Board: "Arduino/Genuino Uno" c:\program files (x86)\arduino\hardware\tools\avr\bin../lib/gcc/avr/4.9.2/../../../../avr/bin/ar.exe: unable to rename 'core\core.a'; reason: File exists exit status 1 Error compiling for board Arduino/Genuino Uno. Invalid library found i…

I can't seem to even manage to upload any code to the Arduino- Error message cop

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