Hello @Vigneshwaran M
You can block user access to scheduled tasks in a number of ways. To block access at a Group Policy level, perform the following steps:
Start Group Policy Editor (GPE) for the container you want to modify.
Expand either User Configuration or Computer Configuration.
Expand Administrative Templates, Windows Components, Task Scheduler.
Double-click "Prevent Task Run or End."
Select Enabled and click OK.
-----
--If the reply is helpful, please Upvote and Accept as answer--