If you must, ask Piriform at https://www.piriform.com/support
W10 changed a bit so a new version may be required.
I have an old Ccleaner on a CD that I want to install on Windows 10 but the s/w comes up not compatible. My PC is a laptop ACER Aspire F17. No problem running it on an old HP Laptop with Windows 8.1 that died.

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