COMPLLING ERROR

[prema]

Arduino: 1.8.7 (Windows Store 1.8.15.0) (Windows 10), Board: "Arduino/Genuino Uno"

c:\program files\windowsapps\arduinollc.arduinoide_1.8.15.0_x86__mdqgnx93n4wtt\hardware\tools\avr\bin\../lib/gcc/avr/5.4.0/../../../../avr/bin/ar.exe: unable to rename 'core\core.a'; reason: File exists

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

[ober]

Never have this error before and do not know the solution. Sorry.

But googling it show some discussion:
https://forum.arduino.cc/index.php?topic=515052.0 you might need to disable antivirus or run in administrative mode.

Another discussion: https://github.com/esp8266/Arduino/issues/2987