During defragmentation I've noticed "unmovable files". How does a file become unmovable? What is in these files? Can they be deleted?1 person needs an answerI do too

Certain files are unmovable. For example, all of the files associated with bootstrap loading anre unmovable. This is because the computer BIOS is programmed to look at a certain place on the hard drive for boot files. Also, the virtual memory file (or swap file) is usually unmovable. This is to ensure optimal performance of virtual memory. Some other files that rely on consecutive, contiguous disk space may also be unmovable. Examples might include index files for databases, cache files, file allocation tables.Although any file CAN be deleted (if enough effort is exerted), these files are generally protected so as to avoid accidental deletetion. My advice would be to leave the files alone unless you know exactly what they are and whether they are necessary or not.