Windows 7: Restore OS & all program back to drive C

Dear All,
Since wrong press F11(Recovery) which caused cannot boot up the Windows, but whole OS and all application program moved to Drive D (Type dir d: can browsed at command prompt under System Recovery Option)
Would like to know how can I backup whole partition(Drive D:-Windows, All application programs & working data) and can restore back to Drive C ?

Thanks in advance.

Did you make the OEM manufacturer's Recovery Disks?

How to use HP Recovery:
Recover Windows 7 Operating System Using HP Recovery - HP Customer Care (United States - English)
Performing an HP System Recovery in Windows 7 - HP Customer Care (United States - English)

How to make HP Recovery DVD disks:
Recover Windows Vista Operating System Using HP Recovery - HP Customer Care (United States - English)

How to make HP Recovery USB disk:
Creating a Recovery Disk on a USB Flash Disk HP Pavilion dv6700z CTO Entertainment Notebook PC - HP Customer Care (United States - English)

or
You can Order HP Recovery Disks from here:
Compaq Mini CQ10-500 PC series*-* HP Notebook PCs - Order Recovery Discs for Windows 7, Vista, or XP - c00810334 - HP Business Support Center

Dear Theog,

Thanks for your information.
Yes, I've 3 original HP Recovery Disc, however, the information seems for notebook only, does it also can use on desktop machine ?

RGDS

Yes, it is base info for HP/Compaq PC's.
You can check your model on the HP/Compaq website.

OK, I'll try it, but, also would like to know does is it one way to recovery the machine only ?

HP/Compaq Recovery will restore to the first day you had your new PC.
Make sure you backup your personal data.