Hi and welcome to B-C
Clicking can be associated with a failing hard drive - but it is rarely intermittent as you describe.
As a precaution backup any files / data from the drive that you do not wish to lose.
It could be malware related.
Download MBAM from here: [ click on Products and scroll down .....you want the free version ]
You may get redirected to a mirror site - this is OK.
[make sure you only d/l MBAM from the mirror site]
Install > Update > Run
It will produce a log in Notepad.
It will be obvious if it finds anything.
If it does I suggest that you post the log [ and an explanation ] in the Malware Removal Forum for the experts there to advise further.