You can open windows explorer (Flag/E) and do a properties on the drive you wish to scan, go to the tools tab, error checking/check now, if you tick the box "automatically fix file system errors" it will perform the task on the next reboot, if not it will run the checkdisc immediately, but will not do any repairs, but will show if there are any.

In Windows XP this is called Check Disk. When run it checks the disc for errors.Windows 95,98 and ME, used ScanDisc.