Cannot run check disk

[Otyokwa]

I wanted to defrag my system files which can only be done during a reboot.
When I ran my software it said it failed to start and I needed run chkdsk
/f/r. I have tried many different ways to get check disk to run, none being
successful. These include running as administrator from the command line,
going to c>properties>check for errors, running check disk from tuneup 2008
software...nothing works. I contacted the ever-helpful folks at dell (I have
an inspiron 1525) who told me that check disk no longer works with vista.
Since I know this to be false, is there any way to get my check disk to work
properly?
Thank you

 

[Otyokwa]

I have read previous posts on this subject and none work. (running in safe
mode etc) When trying to run check disk at start up, a blue screen pops up
during bootup for a second and then windows restarts again. I am running
vista home premium sp 1.
Thank you

 

[Mick Murphy]

http://windowshelp.microsoft.com/Windows/en-US/Help/bc1393cf-9f9c-79c7-0f91-9337c2c41f811033.mspx

Read the above link.
It is worded differently in Vista to do Disk Check.