How to reset the use/password of jenkins on windows?

You can try to re-set your Jenkins security:

1. Stop the Jenkins service
2. Open the config.xml with a text editor (i.e notepad++), maybe be in C:\jenkins\config.xml (could backup it also).
3. Find this <useSecurity>true</useSecurity> and change it to <useSecurity>false</useSecurity>
4. Start Jenkins service

You might create an admin user and enable security again.

Read Initial password :

C:\Program Files(x86)\Jenkins\secrets\initialAdminPassword

Default username is 'admin' and the password is the one from initialAdminPassword when you follow the above path.

'Manage Jenkins' --> 'Manage Users' --> Password

Then logout and login to make sure new password works.

This is for windows environment:

I got the Initial Admin password under C:\Users\Deepak("MyUser").jenkins\secrets\initialAdminPassword

I was able to login with user "admin" and above password. Then under Jenkins> people I edited the password of the user and clicked on apply to reflect the changes.