I have a SanDisk Cruzer Glide 128 GB USB stick that is now write protected. Basically Windows Believes it to be a CD-ROM. I have tried it on two different Machines, same result. There is no hardware switch on the stick. I canät write new files to it (some 14 GB still availabe) and I canät delete files from it either. Checking under [drive]Properties-->Hardware-->Drivers I find all the Three normal drivers for a USB stick are there. It hasn't affected other USB sticks, so it is something directly related to this stick.