Unless you are running an air-gapped Windows XP machine for retro computing hobby purposes, you should avoid Photoshop 7.0. Instead, install or use Photopea —you get the same functionality, modern features, and zero security headaches.
Stay safe, keep your antivirus on, and always verify file hashes before running old executables. Disclaimer: This article does not endorse piracy or provide links to cracked software. Always download software from the official developer or trusted, verified repositories.
Adobe offers a 7-day free trial of the latest version via Creative Cloud. Alternatively, search for legal second-hand licenses of Adobe CS2 (which Adobe officially released as a free activation download years ago, though support is null).