How can I quickly and SECURELY unclean the laptop?

Ea
2

My Samsung is older, but everything is ok, only it runs a little longer when opening files etc.

Do not want to play around, but safely unclean. Tip?

Is

https://www.jam-software.de/treesize_free

And disk cleanup.

Ca

Avira Antivir in the paid version.

(with the free version you can see how much Avira is shoveling in the paid version)

https://www.chip.de/...98486.html

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