As maybe we all know, Windows gets slower with the time, (it doesn't happen in Ubuntu) and due to this I want to 'restart' my laptop, from Windows to the default settings when it was new, using the backup software that my laptop include. I have done that before I installed Ubuntu, but now I think doing it will arise some conflicts due to the partitions. So first, I want to uninstall Ubuntu, (which in fact is a little untidy because it was the first time I installed it and I use it to experiment, for example I didn't install the Home folder in another partition), then restart the laptop with default factory settings to fix Windows, and then install Ubuntu again.
So, it is necessary to uninstall Ubuntu before I return my laptop to factory settings? If it is necessary, how do I uninstall it properly?
Is there any way to only reinstall Ubuntu without affecting Windows?
Thanks in advance...