A. Well, it's not in Start, All Programs, Accessories, System Tools... Here are some ways to find it from the most complex to the easiest:
This one took some real thought over at the Microsoft campus on how to make things simple... Start, Control Panel, Performance and Maintenance, Administrative Tools, Computer Management, Disk Management, Storage, right-click the Volume, Tools, Options, Check Now button, Select Options, Start.
Start, All Programs, Accessories, Windows Explorer (right where it is really handy!), Expand My computer, right-click the drive, Properties, Tools, Check Now..., Select Options, Start.
Start, right-click My Computer, Manage, Storage, Disk Management, right-click the Volume, Properties, Tools, Check Now..., Select Options, Start.
Double-click My computer on the Desktop (or Start, My Computer), select drive, File, Properties, Tools, Check Now..., Select Options, Start.
My Computer, right-click the drive, Properties, Tools, Check Now..., Select Options, Start.
You may be prompted to restart Windows before it will run.