Once you have downloaded the ISO, do not install it immediately. Verify that the file hasn't been tampered with.
You cannot simply copy the ISO to a USB drive. You need a tool to make it bootable. download windows xp sp3 iso 32-bit original
Since Microsoft has removed the official download portals from their site, finding a "clean" (unmodified) ISO is difficult. Many websites offer modified versions filled with bloatware or malware. Once you have downloaded the ISO, do not
To find an original copy, look for the SHA-1 Checksum. This is a digital fingerprint of the file. If the file you download matches this fingerprint, it is an authentic, unmodified copy of the original disc. You cannot simply copy the ISO to a USB drive
If you are a Visual Studio subscriber, Microsoft still allows you to download legacy OS ISOs from the Visual Studio Subscriber Portal. This is the only official source left.
If you see these, avoid the site immediately: