So recently I got Bsod because of corrupted system files. My CD drive is not working. So how could I fix this, but not to lose any sofwares installed. I really cannot agains dl and install winrar, deamon tool, adobe reader and milion other little pluso other design softwares like blender, photoshop, unity 33d and such. Simply I would like to know how could I fix blue screen of death caused by corrupted os with out losing installed staff. If there is need to install something please tell how and is it possible with fflash usb drive.