[FIXED] How to reset the user/password of Jenkins on Windows?

Issue

Maybe a fool question, I installed jenkins on windows by default, have set no user/password, it worked at first, no need to login. But when launch the 8080 webpage now, it hangs the login page, I've tried some normal user/password combinations, none could pass. Also searched the resolution on website, only find some about linux, no about windows, so need help. jenkins login page

Solution

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.

Note: On more recent Jenkins versions running on Windows the config.xml file is found here: C:\Windows\System32\config\systemprofile\AppData\Local\Jenkins\.jenkins\

Answered By - Tuan