Hi ..Thanks for the reply.
I have done clear reboot , restarted several times but no luck, it is still growing to 100% sporadically .
I uninstalled Avast Anti virus too. One observation forgot to tell , disk shows 100% as soon as system is on/restarted and later on it reaches sporadically. when composing this msg it is 1 or 2 %.
Since it did not fix , i did not do the step you mentioned as Note.
Note: Please go through the section: How to reset the computer to start normally after clean boot troubleshooting to boot the computer in normal startup after fixing the issue.
--------------------------------------------System is still left as all suggested things disabled.