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Problem My computer won't start. There is no green light power indicator on the front of the computer and no fan noise. Solution Check all power cords to make sure they are connected. If you suspect a faulty cord, test it with another computer that you know is working. Also check outlets with the functioning computer, and make sure to turn on wall outlet or power bar switches. If you are using a Macintosh, try the front power switch as well as the keyboard power switch. Problem My monitor won’t come on. Solution Be sure the monitor is plugged in and the green indicator light is on. Try the on/off switch a few times. If it still does not come on, call your technology department. Problem My mouse pointer won't move. Solution Check that the mouse is securely plugged into the keyboard ADB port or into the back of the computer. Your mouse may also be dirty -- remove the mouse ball , clean it as well as the rollers inside the mouse. Problem My computer is on but nothing ...

There are so many reasons behind a corrupted system file. If you are getting an error like “file missing or corrupted” message in Windows, you should try to repair one or more system files first.  But before you try third-party tools to repair system files in  WINDOW 7, you must try a effective command line tool to repair corrupted system files. In this guide, we will show you how to repair Windows 7 system files without using any third-party tools. 1 . Type command prompt in Start menu search box and then hit Ctrl + Shift + Enter to launch the Command Prompt with administrator rights. Alternatively, go to Start , All Programs , Accessories , right-click on Command Prompt and then select Run as administrator option .   2 . Click Yes if you are prompted with UAC (ACCOUNT CONTROL BOX) box. 3 . Once the Command Prompt opened, type sfc /scannow and hit enter. This command scans integrity of protected system files and th...