Reinstaleaza aplicatia, dar cand dai uninstal ai grija sa fie sterse toate fisierele care apartin acestei aplicatii.
Uite aici un tutorial de instalare
http://tutorialpc1.blogspot.ro/......20Mesenger
Nu uita dupa ce dai uninstall la aplicatie foloseste CCleaner, acesta curata toate fisierele inutile, orfane ramase in urma stergerii programelor din calculator.
CCleaner cel mai bun program utilitar pentru Windows - Setari program
Am incercat si tot "this aplication has failed to start because d3d9.dll was not found. Re-instaling the application may fix this problem" mi se deschide