Thank you for the answer but I can't understand why the screenshot images & quoted log are not showing. Anyway I don't have any option to close JDownloader as it isn't opening at all. I should mention that I can't delete any file or folder as my system's C drive isn't showing any installation folder for JDownloader though JDownloader is still showing as installed program in my system's program list but I can't uninstall it. Is this problem related to Java anyway as the log file is showing lots of error related to Java. I've already mentioned that my system doesn't have any Java versions.