BOAC,
I do not know why your Right Click is not working, but if you need your disk tools, go:
Start >>
Programs >>
Accessories >>
System Tools
In there you will find Defrag.
If you are looking for Checkdisk, you will find it in your System32 folder.
Then there is:
Start >>
Control Panel >>
Administrative Tools >>
Computer Management >>
Disk Management
Where as long as the drive is highlighted, you can click on Properties on the top toolbar and access
Error Checking from there.
Take Care,
Richard