If you have problems writing to your disk, check the write-protect tab on the disk. Do not try to access a CD-ROM drive before its light switches on. Otherwise, the computer thinks there is no disc in the drive. An operating system is a program, which supervises the running of other programs, such as controlling the input and output functions and overall communication with the hardware and other resources. Drives are designated by a letter and a colon.
Most word processors save files with special formatting codes.
Text files vs. Image files. Closing Remarks Save your work often. Back up your disks. Generally if you don't know what the file is, don't delete it. If a program cease to run properly, try rebooting.