Wipe WiN10 & Replace with WIN7 PRO

I want to replace my flaky keyboard HP Envy Laptop with a new HP Laptop (that only comes with WIN10). I want to replace the WIN10 with WIN7 PRO (which I have the disk). I was told a few weeks ago on this Forum it could not be done with the WIN10 resident drivers. I was also told,

{If it were me, I`d pull your W10 drive, put it in the desk drawer and install a solid state drive for W7, especially on a laptop.}

What if I buy a new HP Laptop with the Intel Core i5 Processor and 128GB "Solid State Drive already installed"? Question is: Can this be done? With expert advice from this Forum? Once again, the new laptop would come with WIN10 and the Solid State Drive already installed. I want to wipe it and install WIN7 PRO.

Getting braver, but not quite there yet.

As Brian advised, new gen (skylake, Kabylake and Coffeelake) only has USB3.x ports. You must add the USB3.x ,SATA and M.2 drivers to the Win 7 installation disk.
Create a Windows 7 USB flash installation with new drives for new MB's - Windows 7 Help Forums
Use Macrium https://updates.macrium.com/reflect/v7/ReflectDLHF.exe do make a disk image of the win 10 before you begin.
Before you buy or wipe the disk, give us the laptop brand and model so we can guide you.

I know that is not the title of the original post. This jumpy cursor, all over the page, while typing had me almost to buy a new laptop. I didn't like WIN8 and assumed I would not like WIN10. Main reason was some of my programs are old and would not work on 8 and probably not on 10. After Googling "jumpy cursor", I ran across a small program called TouchFreeze-1.1.0.msi which disables the touch pad while typing. It seems to work, so I am not interested in "junking" my HP Envy laptop. Thanks for everyone's advice and I may back with other problems if they erupt.
"Grateful" Joe

I totally get it. I also have a HP laptop....similar
I updated from windows 7 to Windows 10 with the free upgrade....to support clients.
I worked with my Windows 10 but it turned out to be slower and far less secure than Windows 7.
Less secure was mainly by Design with Windows actively changing settings I had set previously.
ie. Removal of ControlPanel etc.
Denial of Service by the vendor of the OS seems to be what is happening.

The "jumpy" cursor happened to me also not long after the Win10 creators update.
...but delving deeper ...it was more serious than that.
My laptop went from very reliable to unreliable.

It seemed to be Windows 10 and a UEFI BIOS smashing a physicall location on the HDD.
If you installed Windows 7 before the latest UEFI BIOS, you would see a different HDD partition with MBR
and a different Windows 7 install as a result.

My Windows 7 installs require specific customisation to secure but worked well and was more reliable.
...and of course I keep a backup of my data also.

I rolled back to Windows 7 but not without issues either.
Windows 10 became unreliable and was unsecure due to Windows own updates.
The impact from their dodgy updates have proved much worse than any virus.

I would rollback the BIOS also if you are going back to Windows 7 unless you require very specific UEFI features.