Windows 7: Partition help

Hi all,



I have the following hard disk layout:
When I try to change the third partition's letter using Partition Wizard, I get an error that it can't be done 'cause the drive is being used. (note: I did this for testing purpose, otherwise the installed programs woudn't function anymore)
I didn't have any other applications opened, so I explored the drive with hidden folders visible. Nothing special.

I then inserted a linux live cd, mounted partition 3 and noticed a SystemVolumeInformation folder, which probably is causing it to be handled as a system partition (although Partition Wizard nor Windows' built-in partition tool mark it as system)

I'm curious about the fact why that partition (3) has been acting like this, and why partition 2 hasn't. They both have applications installed, they both hold documents...

Can anyone show me the light? x)

~Propa

Perhaps you installed something on the 3rd partition that starts at startup or is running in the back ground.

~Lordbob

Nope, I verified this through msconfig.

Well, check to see what programs you have installed on there, and make sure they are all off.

~Lordbob

Try in safe mode or safe boot mode. Then all handles are off.

Like I said before: I already did this.

I'm not intending to actually change anything, I'm just curious.