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              Disk Clean Up Disk Clean-up is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive. It was first introduced in Windows 98, but has now been deprecated and replaced with a modern version in the Settings app, although it still exists as a legacy tool in Windows.

Disk Defragmentation Defragmentation, also known as defragging or defrag, is  the process of rearranging the data on a storage medium, such as a hard disk drive (HDD), for efficient storage and access . Defragmenting a hard drive can improve a computer's or laptop's performance and speed .

  What is Computer? The computer is an electronic device that takes input from the user and processes these data under the control of a set of instructions (called program) and gives the result (output) and saves future use. The word Computer is derived from the word Compute, which means calculation. Note:  Charles Babbage is the father of computer. Working process of Computer? Input - Process - Output Concept (IPO) The concept of generating output information from the input data is also referred to as input-process-output concept. Input - Accepts data Processing - Process data Output - Produces data Storage - Stores data Input (Data): Input is the raw information entered into a computer from the input devices. It is the collection of letters, numbers, images etc. Process : Process is the operation of data as per given instruction. It is totally internal process of the computer system. Output: Output is the processed data given by computer after data processing. Output is also...

  Libre Writer Font name : Liberation Serif Font Size:  12pt By default zoom:  100% Minimum Zoom:  20% Maximum zoom:  600% File Extension name:  OpenDocument Text (.odt) By default file Name :  Untitled 1 File Template extension name:  OpenDocument Text Template (.ott) Minimum Font Size:  6pt Maximum Font Size:  96pt Libre Calc Font name :  Liberation Sans Font Size:  10pt By default zoom:  100% Minimum Zoom:  20% Maximum zoom:  400% File Extension name:  Open Document Spreadsheet(.ods) By default file Name :  Untitled 1 File Template extension name:  OpenDocument Spreadsheet Template (.ots) Minimum Font Size:  6pt Maximum Font Size:  96pt Libre Impress Font name :  Liberation Sans Font Size:  18pt By default zoom:  76% Minimum Zoom:  5% Maximum zoom:  3000% File Extension name:  OpenDocument Presentation (.odp) By default file Name :  Untitled 1 File Te...

  Common Shortcut Keys for windows Press this key To do this Ctrl + X Cut the selected item. Ctrl + C (or Ctrl + Insert) Copy the selected item. Ctrl + V (or Shift + Insert) Paste the selected item. Ctrl + Z Undo an action. Alt + Tab Switch between open apps. Alt + F4 Close the active item, or exit the active app. Windows logo key + L Lock your PC. Windows logo key + D Display and hide the desktop. F2 Rename the selected item. F3 Search for a file or folder in File Explorer. F4 Display the address bar list in File Explorer. F5 Refresh the active window. F6 Cycle through screen elements in a window or on the desktop. F10 Activate the Menu bar in the active app. Alt + F8 Show your password on the sign-in screen. Alt + Esc Cycle through items in the order in which they were opened. Alt + Enter Display properties for the selected item. Alt + Spacebar Open the shortcut menu for the active window. Alt + Left arrow Go back. Alt + Right arrow Go forward. Alt + Page Up Move up one screen. A...