Laptop slow when something is being downloaded / was?

If I download something on my laptop, the laptop will be very slow afterwards. Shutting down, for example, takes about 5 minutes. I have Windows 10

With this sparse information you can't expect a useful answer. What kind of laptop is this? What kind of processor is in there? How much memory does it have?

Just right-click on the taskbar, then task manager, then on performance and let's see how much your hardware is loaded. Maybe post these values again, everything else makes no sense.

Device Specifications:

Y520-15IKBN

Device name Desktop 234P8GM

Processor Intel (R) Core (TM) i5-7300HQ CPU @ 2.50GHz 2.50 GHz

Installed RAM 8.00 GB (7.89 GB available

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(By the way, a download was on the way)

Something can happen sometimes when Windows downloads an update in the background and / or installed. If that is more or more often, it can also be a virus or malware. Then let your antivirus program do a complete search.