Defraggler replacing Windows Disk Defragmenter questions

I have 2 questions about Defraggler

1. With replace Windows Disk Defragmenter on will clicking (Defragment disk/Analyze disk/Configure schedule) in Windows Disk Defragmenter use Defraggler instead of Windows Disk Defragmenter.

2. With replace Windows Disk Defragmenter on Will Defraggler do scheduled defragmentation instead of Windows Disk Defragmenter

Piriform Defraggler and Windows Disk Defragmenter (now called Optimise Drives under Win8/10) are separate programs that do the same thing.

You can use either.

Setting up a scheduled event can be done for either, or both, programs.

So scheduling Defraggler to run monthly will be independent of a schedule to run Windows Defragmenter weekly, for example.

Installing Piriform's Defraggler does not replace the inbuilt Windows defragger.

See here for more info

https://www.piriform.com/docs/defraggler/defraggler-settings/defraggler-options-advanced-tab

Installing Piriform's Defraggler does not replace the inbuilt Windows defragger.

Ooops, unless of course you tick that option.