how do i check disk for consistency?

 Hi, for a number of weeks at start up my laptop shows a screen and on it it mentions that one of my disks need checking for consistency. When the computer starts up, the real time protection icon is red and i have to turn it back on. Please help.

Spock (rhp)2020-12-17T15:16:11Z

CHKDSK is, i believe, the program you want.  it runs from the command prompt and is built into Windows

David2020-12-17T14:49:02Z

Go to My computer or This PC
Right click on the C drive
Select Properties, tools, check drive for file system errors
Repeat for any other drives listed apart from DVD/CD drives

?2020-12-17T11:21:00Z

Run chkdsk /r.