Jerry56,
You bought this refurbished, right?
I checked Dell Support, and what Microsoft OS's that will run on your system.
Windows 10 is not listed.
But I suspect, like
Digerati, that the Hard Drive was formated in 32bit.
So, that Windows 10 would run on it.
To find out, type in the Search box:
System Information.
It should give you most of the computers information.
Signed: Ensign Tzap