How to convert a 64-bit operating system into a 32-bit operating system?

Can't convert, can only be reinstalled.

1. For example, download a 32-bit win7 image file from the system website.

2. Decompress the gho.win7 in the image file to the ghost folder in the system disk of the USB flash drive.

3. Set the U disk system disk as the first startup item.

For example:

1) Dell computer, press F2 to enter the startup item setting.

2) Use the keyboard direction keys to select the USB flash drive, and then press enter.

4. Enter the U disk system disk menu.

5. Select the previous serial number 4 or use the arrow keys to move to the installation system directory, and then press enter.