I am using Windows 7 Prof. and trying to get a Uno R3 working. I have installed the driver and find the Uno on COM12. However, when I try to compile or upload it takes a long time, then gives an error message. The upload error message is . . . .\hardwar\tools\avr\bin\avr-ar; unable to rename 'cor…

Please help very frustrated new user WIN7 and UNOR3

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