I just started trying to make my recently buyed first arduino and I got stuck just in the very first step of making it work.
Trying to upload the blink example but with different time lapses for blinking, i get the next error while trying to compile.
"C:\Program Files\Arduino\arduino-1.0\hardware\tools\avr\bin\avr-ar: unable to rename 'core.a'; reason: File exists"
I'm using an Arduino Uno, with Windows Vista. I've installed it as told in the instructions and the thing is it has worked once of the about 50 that i've tried, and it compiled and uploaded.
I tired to reinstall all the folder, and worked well in the first try, but I keep on getting the same message now.