I have a HP dc7900 running Win 10 Home 32-bit OS upgrade.   Here is my computer information reference to Belarc Advisor.
Processor:  3.00 gigahertz Intel Core 2 Duo  E8400.
64 kilobyte primary memory cache
6144 kilobyte secondary memory cache
64-bit ready.
I have  3580 megabytes usable installed memory.
I want to buy a Windows 10 Home Installation Disc with 64-bit OS.
Question:   Will I be able to use the New disc to install the  Win 10  64-bit Os on this computer?