My USB is Lexar 32gb, with NTFS fs and no lock switch. After I installed the platform (14.4.3), it was working for a little while. Suddenly, when I try to exit, it said something like "Unable to write to E://PortableApps/PortableAppsMenu/Data/PortableAppsMenu" or something like that. After that, all the files on my usb are write protected, and I don't seem to have the control over it, as Nothing seems to have worked. I have tried using the registry, low level format, cmd, editing the security in the properties of my usb, format, but it always brings a pop up saying that my files are write protected. Is my usb gone?