For work faster in computer we need some shortcut keys. With help of shortcut keys we increse the speed of work and consume less time compare with without shortcut keys.
Ubuntu is based on Linux Platform OS. It is based on open source means free for all human who want use that Ubuntu is one the best OS compare to the others. Ubuntu never never detect any viruses cause this OS does not support .exe file. So this OS is highly secure with others.
Disk Defragmenter is a one of the best features for the Microsoft OS. Disk Defragmentation used for increase access speed by rearranging files on disk.
Safe mode starts Windows with a limited set of files and drivers. Start up programs don’t run in safe mode, and only the basic drivers needed to start Windows are installed.
Safe mode is useful for troubleshooting problems with programs and drivers that might not start correctly or that might prevent Windows from starting correctly.