Trojan horse Downloader.Stubby.A

AVG Resident Shield just poped up and said that i have Trojan horse Downloader.Stubby.A and it said it was in C:\DOCUME~1\COLORT~1\LOCALS~1\Temp\V6I83Oa02140 and when i got to find that file i cant find it at all it isnt in any of my files. Does anyone know why it poped up and do i really have this trojan?

Looks like a false alarm. If avg still finds it, start your PC in safe mode and let AVG delete the file.
BTW: You can delete any file or folder inside the temp folder