Is it possible to run a UiRobot in RDP machine with out open RDP machine from any other local machine(or from my computer)?

@Linto yes it is possible to run the bot in unattendted mode with the help of uipath orchestrator.

without orchestrator?

@linto without orchestrator we cannot start the unattended robot i assume.

try using windows task scheduler

How its works in windows task scheduler?. How to configure windows task scheduler?.

No it is not possible to use windows task scheduler. It has been historically, but not anymore. Only with orchestrator.