Her Internet Cable definitely should be disconnected, particularly if
she is using a firewall.  You don't want anything writing to the
drive......and with cable, a firewall is constantly fielding pings, etc.

Go to Safe Mode and do the Scandisk first and then Defrag.  You get into
that by holding down the Ctrl key while rebooting and you should get a
screen with 4 choices......pick Safe Mode (#3) and do them from there.
This bypasses Windows.  To get back to Windows, do the
Start/Shutdown/Restart again and it will come back up.

Cheers.....Heather

Get the free ScanDefrag. It is the most advanced disk maintenance
program there is. It runs Disk Cleanup, ScanDisk, and Disk
Defragmenter. It's easy to setup and use, and it can deal with
problems like "drive's contents have changed: restarting...".
Get it and read about all the options it has that you can use.
http://home.earthlink.net/~bblanton2/scandefrag/main.htm
http://www.blueorbsoft.com/scandefrag/index.html

It is not unusual to see Defrag restart a number of times.
It is , however, unusual to see ScanDisk restart.
This is why I suggest starting it at bedtime and letting it run overnight.
Please, email "The ScanDefrag Team" if you have any problems using our program. Your problem, will be properly attended to.  And we assure you, that every attempt will be made to resolved it..
To see how to email us, read the ScanDefrag "Readme" file, using ScanDefrag under the "Help" menu.