I just finished downloading everything for my Arduino but when I open my computer to use it the next day, I find that everything is gone and all the plug-ins I download again aren't working!
Anyone know why?
Are you using the Arduino Web Editor?
Lots more info please.
OS ?
USB port type ?
Board type ?
IDE version ?
Hardware attached to the Arduino ?
There are some posts near the top of the forum may I suggest you read those prior to adding any extra information.