If your Pc is running on 32-Bit then you must be missing a lot,
Upgrading fromm Windows 10 32-bit to 64-bit is actually free and less stressful..
*Firstly you have to check if your Pc can run on 64-bit by pressing the
Windows key + I on your Keyboard
*Click on
System*Click
About* Under System type, check if your System says
32-bit operating system, x64-based processor thismeans your PC is running a 32-bit version of Windows 10 on a 64-bit processor. If it says
32-bit operating system, x86-based processor, then sorry your computer doesn't support Windows 10 (64-bit).

Another way to do this is by opening
System InformationOpen the Start menu, search for
System Information, and Enter.
Check under
System Summary located on the right side, check for
System Type.
If you see
x64-based PC, then your computer can run a 64-bit version of Windows, but if you see
x86-based PC, then you will not be able to install another architecture of the operating system.

Make sure your Pc hardware is compatible with 64bits windows 1, This can be verified using
CoreinfoDownload
Coreinfo here
To setup Coreinfo, open the folder you downloaded Coreinfo, right-click on the zip folder, and select
Extract all.

After Coreinfo folder opens, click on
File, and select
Open command prompt
Type in the command
coreinfo
and press Enter.
Then Coreinfo will list the processor information, Its important you make sure
PAE, NX, SSE2, and CX16 are present (you can use Ctrl+F keyboard shortcut to open the find command).
If the 4 features listed above are present, then you are free to upgrade to Windows 10 (x64).

Finally Install Windows 10 64bit
Restart your PC with the new installation media connected and proceed with the installation of Windows 10.
On the Windows Setup, click
Next.
Then click
Install now.
As you previously have an activated version of Windows 10, you can skip the option if you are instructed to enter a product / licence key.
Accept the licensing agreement and click
Next.
Then click the
Custom: Install Windows only (advanced) option.

Make sure you select and delete system partitions mostly
Drive 0 Partition 1 and Drive 0 Partition 2.

Finally click
Next and follow other instructions
After successful installation ensure that you visit
Settings > Update & security > Windows Update to download the latest updates and drivers.
One of the main advantages of the 64bit Windows 10 is that the 64-bit version fixes the 3.5GB of RAM limitation that is in the 32-bit version of the operating system.
So you can run more applications simultaneously.