If your computer has got a 'virus' of any kind, it can start to run sluggishly. Windows 10 comes with a free antivirus software called 'Windows Defender', so here's how to use it to clean things up.
In the search box, type 'Defender'.
Open the Windows Defender shortcut.
Click Full, then choose Scan now.
When the scan has finished, any problems should have fixed themselves.
Some programs will start automatically when Windows boots up. Having lots of these programs can slow your computer down, so here's how to sort them out.
Hold down Ctrl, Shift and Esc to open the Task Manager.
Click the Start-up tab at the top.
Have a look through your programs. Any that have 'medium' or 'high' startup will be using the most power. If you can see any that you don't use, click Disable to stop them from starting automatically.
'Fast Startup' is a way to get your computer to turn on faster, because it doesn't fully shut down. Here's how to use it.
Open the Control panel and choose Hardware and sound.
In the 'Power options', click Change what the power buttons do.
Choose Change settings that are currently available at the top.
Choose Turn on fast startup. It'll take effect the next time you restart your computer.
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