Windows 7: Diskpart error! Help me someone?!

Hello everyone.
I'm a new member here, I was searching around for help.
I hope someone can help me, would do a great job!!

First of all, I have Windows 7 Home Premium HP Pavilion Dv7 - 3111
First, I have installed diskpart.exe
Typed "list disk" In cmd, and choosed my harddrive part "0"
And after, type "clean"


I have done that, but I'll get an error and it says:

Virtual Disk Service error
Clean is not allowed on the disk containin the current boot,
system, pagefile, crashdump or hibernation volume.

I can show you how it looks. More easier for you guys to help me!

PICTURE HERE -> Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

You cant run Clean command on the boot disk while you are inside windows, you'll need to boot to command prompt for that. Heres a tutorial.

Disk - Clean and Clean All with Diskpart Command

Thank you very much
I hope it works, I really miss Windows XP.

I've followed those steps here:

Disk - Clean and Clean All with Diskpart Command

But I don't understand one thing, disk manager?
What shall I do there?

Anyway, when I type "list disk" "select disk 0" "clean"

It still say:

Virtual Disk Service error
Clean is not allowed on the disk containin the current boot,
system, pagefile, crashdump or hibernation volume.


I don't know what to do. Maybe I've done something I have missed?
Not sure, please help me someone

Did you boot into command prompt and then run clean?

If safemodus with command prompt yes. I got this message:

'list' is not recognized as an internal or external command, operable program or batch file.

Picture here -> Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

I tryed command prompt in windows to be sure.
Still got same error as above.