Hello Charith,
My Name is Paul one of the Community Advisor and a Microsoft Consumer like you. You are right and its quite high, you may try to scan for possible malware using your antivirus software. And also try to check for system violations by running the system file checker.
Click START open CMD as ADMIN and type sic /scannow and press enter.
Does it constantly running that high lets say set CMD IDLE for 5 mins?