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Command Description a2p Creates a Perl script from an awk script. ac Prints statistics about users' connect time. alias Create a name for another command or long command string. ar Maintain portable archive or library. arch Display the architecture of the current host. arp Manipulate the system ARP cache. as An assembler. at Command scheduler. awk Awk script processing program. basename Deletes any specified prefix from a string. bash Command Bourne interpreter bc Calculator. bdiff Compare large files. bfs Editor for large files. bg Continues a program running in the background. biff Enable / disable incoming mail notifications. break Break out of while, for, foreach, or until loop. bs Battleship game. bye Alias often used for the exit command. cal Calendar calendar Display appointments and reminders. cancel Cancels a print job. cat View or modify a file. cc C compiler. cd Change directory. chdir Change directory. checkeq Language processors to assist i

To turn ReadyBoost on or off Plug a flash drive or flash memory card into your computer. In the  Autoplay  dialog box, under  General options , click  Speed up my system . In the  Properties  dialog box, click the  ReadyBoost  tab, and then do one of the following: To turn ReadyBoost off, click  Do not use this device . To use the maximum available space on the flash drive or memory card for ReadyBoost, click  Dedicate this device to ReadyBoost . Windows  will leave any files already stored on the device, but it'll use the rest to boost your system speed. To use less than the maximum available space on the device for ReadyBoost, click  Use this device , and then move the slider to choose the amount of available space on the device you want to use. Click  OK . Move the slider to choose how much space you want to designate for boosting your system speed. Notes If AutoPlay doesn't open, it might be disabled. For more information, see Troubleshoot AutoPlay problems. For Rea

Clear​ Spyware         We can use  Microsoft Security Essentials  to clean  System  from  Spyware and  Virus​  Try free space  Hard disk ​​​​​​      Disk Cleanup                                             - Remove temporary Internet files.                          ​​​​​                        - Delete downloaded program files, such as Microsoft ActiveX controls and Java applets.                         - Empty the Recycle Bin.                         - Remove Windows temporary files, such as error reports.                         - Delete optional Windows components that you don't use.                         - Delete installed programs that you no longer use.                         - Remove unused restore points and shadow copies from System Restore. Do  Disk Fragment  Do  Disk Checking Utility