Hey @liu_shubin
For checking about service mode, just see if you can see the UiPath robot service in the task manager services.
If yes then that’s installed in Service mode else not.
Most probably it won’t be based on the behaviour you have explained.
If it’s not in service mode, just run the Studio Installer MSI again which will ask you for modes to choose where you can select the Service Mode and it will auto update the installation.
Hope this helps.
Thanks
#nK