Asus ux32 reinstall windows 7 clean

Hi I would like to do the above and have read the manual which states to press f9 at boot then i believe i should select option 2 after the asus wizard:
"Recover windows to entire hd" "This option deletes all partitions and creates a new system partition as drive c"
OK so is this a complete wipe of the hard drive, ie if i have trojans etc? OR do you have to do something else for that and this may not be the full wipe?I want a reformat and reinstall of windows - remove everything and start again. I believe this is called a "clean reinstall"

Another question i have is that above the instructions for above the manual says "IMPORTANT DO NOT delete the partition *without*(?) a volume label on disk _0. The recovery parition is created at factory and cannot be restored if deleted.

So if i choose option 2 as shown at beginning of text, does that mean i lose my recovery partition for next time? Or is that something else, if so what is it warning me about - how could i accidentally remove the recovery section if i just follow the asus wizard and select the "recover windows to entire hd option?"

I dont need any files , so dont need to back up anything - i just want rid any potential malware fully.

thank you people!

 

the system(even the one in the recovery partition) comes with the computer is old and there are lots of rubbish software installed. If you have a Windows 7 installation disk, just try to remove all the partitions and then install it from scratch.