Windows 7: unable to format local disk C

This is the image of hidden files in local disk C

MSOCACHE is something of ms office which version of ms office do you have?

2007

Do this How to Move the MSOCache in Office 2007 | eHow.com
Do you understand that? So:
Did you make D drive PRIMARY with partition wizard or any other partitioning tool as asked you before?

Do you have a Windows 7 install DVD or system repair disc? One of them is needed later in the proces.
System Repair Disc - Create

YES i have
please post full process ( how to do what ) . I will try that and i will be very thankful to you

Is D drive partition already type PRIMARY???????????!!! Do that first

please tell how to make it primary

Here is what you need to do:

1. Make the D partition 'Primary'. You can do that with Disk Management or with the bootable CD of Partition Wizard (last entry on the page).

Burn that to CD and boot with that CD. Highlight the D partition, go to the Partition tab > Modify.

2. Deactivate the C partition and then activate the D partition. Do that with the Partition Wizard CD.

3. Run Startup/repair 3 times to get the bootmgr on D. Startup Repair - Run 3 Separate Times

4. Test whether your system boots - if yes, you can delete the old C.

Mark the Windows 7 partition active, so that's the boot partition
How to Set Active/Inactive partition with partition magic? Partition Wizard Video Help.
But first make Windows 7 partition primary
Video help on how to set partition as Primary or Logical.
now press apply so it does what it should do.
System won't boot succesfully afterwards.
Boot from Windows 7 install dvd or system repair disc and do a startup repair 3 times with reboots in between.
Startup Repair
Now boot normally.
Now you can delete or format the partition within disk management.