Need help with HDD free space

hi!
I need some help with the calculation of free space on my HDD i have a 458GB HDD but Windows shows i have no free sapce, then that i have some mb's then Kbs and then again no free space, the problem is that i've already run the cleanup tool, eliminated like 15Gb of data (images, documents, video, everything basically) also some programs but it still show that i don´t have free space, i´ve also weighted every folder and it doesent make sense (i should have like 300gb free) i´m also considering like 15gb of system recovery data, please help me my computer is really slow and i need it for doing all my homework and everything, i´ll rlly appreciate all your help!

Can be shadow copies

Go to computer icon
Click
Right click on c drive
Properties
clean disc
clean system files.
Will give you space.

Thanks for your help man but i´ve already tried it, a new awkward thing i noticed today: everytime i reboot my computes (from the reboot option of course) i gain some more free space (like 3mbytes) and so on, also today i got a BSOD telling that windows found a registry error, any ideas of what i can do (without missing or deleting anything important, or that i had to pay for) or should i go straightforward to backup all my files and restore the PC to factory settings?

Before you do anything, get the information on the BSOD, this way. An expert will look at it and advise.

[1 - Novice] How to ask for help with a BSOD problem - Windows 7 Forums

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