Windows 10 is 32 bit instead f 64 bit

Hi, i recently upgraded from windows 7 to windowds 10.

Windows 7 was on my hdd and i upgraded on this hard drive, i have just bought a new ssd and wanted to do a clean install on this hard drive, so i used the method to install windows 10 using an USB, i downloaded windows 10 64 bit from this the official microsoft website, and followed all the steps. I am now running windows 10 on my ssd but its 32 bit, i downloaded the 64 bit again from the same site, to try and install it again, but when i want to open it, it says "this app cant be opened on this PC", i asume this is because i am running 32 bit.

i did a clean install, (formatted old HHD and ssd)

any tips to solve this?

Thx in advance