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CCleaner, developed by Piriform and now part of the Gen Digital group, clears temporary files, browser traces and registry clutter, and keeps an eye on the background software that slows a machine down. Chkey.ch offers CCleaner Professional keys with Swiss pricing.
The Professional edition adds real-time monitoring, scheduled cleaning and automatic updates for your installed applications, none of which the free version provides. A Professional Plus licence covering three devices and an Android edition for phones and tablets are also available.
Key sent by email within 24h, Swiss invoice attached.