SQLite is a relational database management system. SQLite files are temporary files which occupy a lot of disk space on the computer. They can be found in the temporary folder in C drive under windows. These files cannot be deleted by selecting the 'Disk Cleanup'. The files cannot be individually be deleted as well. The best possible option to delete these files is to restart the PC in to safe mode and then deleting the files. The files will be easily deleted. Even after deleting these files, the have a tendency to show up again. In this case, it is better to use an Anti-virus program. Though these files do not spread any viruses, they do occupy a lot of disk space. It is not a bug but just a part of the implementation.