G'Day Henry
Yes you can scan the disk and find lost clusters etc. The name of the program you use in XP is called chkdsk - as I said in my previous post microsoft renamed it. chkdsk in XP was called scandisk in ME, NT and 2K.
Just double click My Computer then right click on the disk drive (partition) you want to check. Left click on Properties then left click the Tools tab, left click the Check Now button, a new window will open, tick/check both boxes and press OK. If you get a message about checking the next time you boot, click OK. chkdsk will then run the next time you restart/boot windows. If you do not get the message, chkdsk will run immediately.
When chkdsk runs, it will fix indexes, find lost clusters and everything the old scandisk (on earlier versions of windoze) does.
Geoff