A computer restart is a good initial step that may resolve a software or installation issue.
How to restart your computer
Select your computer Operating System for restart instructions.
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Windows 10 - From the Start menu, select the Power symbol, then Restart.
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Windows 8.1 - Hold down the Windows key and press I > the Power icon > Restart. If you use a touch screen, you can flick from the right side of the screen, tap Settings, then the Power button.
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Windows 7- Select the Start button > the arrow to the right of the Shutdown button > Restart.
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Windows Vista - Select the Start button > the arrow to the right of the Lock button > Restart.
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Windows XP / Windows 2000 / Windows 98 / Windows ME - Select Start > Turn Off Computer > Restart.
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Mac OS X® - Select the Apple menu > Restart.
If system trouble prevents a restart, use the power switch to turn the PC off, wait a few moments and turn it back on. If you still can't restart the PC, refer to the computer's manufacturer for help.