One of your disks needs to be checked for consistency.

Of this error:

Checking file system on C:
The type of the file system is NTFS.
Volume label is OS.
One of your disks needs to be checked for consistency. You may cancel the disk check, but it is strongly recommended that you continue. To skip disk checking, press any key within 10 seconds(s).

 
 

...which appears as you start up a laptop, this suggests:

• It means what it says.
• You have corrupt files or bad sectors.
• This will come up periodically.

 
 

...which says to me: "Don't worry too much about it." Naive?