Forgetting or losing a 7zip archive password can be frustrating, especially when you urgently need to access the files within it. However, there are several methods you can try to recover a 7zip password:

1. Use Password Guessing: If you have used the password before or have a habit of using specific patterns, try guessing the password.
2. Use Common Passwords: Sometimes people tend to use common passwords. You can try using common passwords lists to recover the password.
3. Use Password Recovery Tools: There are various third-party tools available online that can help recover 7zip passwords. Tools like Passware, Atomic, and SmartKey are known for their effectiveness.

It is essential to note that password recovery tools may take time depending on the complexity of the password. Additionally, make sure to download such tools from trusted sources to avoid malware or security risks.

Remember, prevention is better than cure. It's always a good practice to keep a backup of your passwords in a secure password manager to avoid such situations in the future.