Asus G73Jh - Disk Space after NORMAL install

Hi guys,
in short: I recently acquired a 120GB SSD, will be using program called "Paragon Migrate OS to SSD" - However, I'm not able to do it 100% as intended because I have a LOT of crap (useful software and games) on my OS: C. (Will still be using this tool though).

I was considering fresh windows install, but won't bother due to I don't have the recovery disc (I got "built in") - and I couldn't give a burning one either or downloading a Windows 7 iso thingy or something or even following some long recipe.

Which means I wont do anything really complicated (I can, but I WONT due to lack of EASY resources (high speed Internet, RW DVD discs etc.)

My temporarily solution is to just make a new install of OS and have my saved data on D and then use the program to transfer C to SSD - which brings me down to this question:[/I]

How much disk space (with all the crapware) does a Windows Install take with the normal procedure? (How many GB's will be used on C after updating everything).

Reason: I dont have time to do any of this right now or the next days/ weeks, but I can always fix and clean up later (bit for bit - I really don't got much time on my hands)

A simple answer of X GB will be much appreciated (I got home premium) - and no, googling did not help.

EDIT; Additional:
To clarify: after updating everything (all windows updates, service packs etc.) but not anything else.... err useful. Approximate size is also great appreciated.