windows 7 is it 32 or 64 bit and how much ram will each support

Once you have the ISO file, you cannot simply copy it to a USB drive. You must make the drive bootable.

Microsoft ended extended support for Windows 7 on .

If you need to download the ISO, proceed with caution. Avoid "cracked" or "pre-activated" versions found on file-sharing sites, as they almost always contain malware or rootkits.