Windows 7: Need help/more info in regards to mounted folders

In short, here's my desperate situation:




I'm trying to install some Windows updates including Windows 7 Service Pack 1, but it keeps telling me there's not enough disk space.

I have two main main questions:



1. Can the extra space offered by mounted folders be recognized by installers? (so to avoid 'not enough disk space' situations)

2. Can I *cut* files/folders from C:\ to the mounted folder and expect my system to work normally? As my understanding is that all mounted folders lead to C:\.

Furthermore, I do assume all further updates will be installed in the mounted folder? (I use 3rd party programs for updates).


*End note
I've scanned my drives a few times using every cleanup tool offered by the Windows, 360 Safe Guard and System Mechanic, as well as deleting what I reasonably could so I believe there's nothing more space I can reclaim.

On a side note, every cleanup attempt seems to have resulted in slightly less space then before.

I'm not surprised that you're having problems with the system - a 20GB drive is sufficient for installing Windows into - but not for allowing anything else.
Your best option is to stop messing around, and do a reformat and reinstall, with a more sensible partitioning setup.

You should allow a MINUMUM of 40GB for the OS - assuming you have very few programs installed.
I have my OS and programs installed on the C: drive, and the data (mostly) elsewhere - and the C: drive has just hit 100GB - with the \Windows folder alone being '17GB size on disk' according to Properties.