ak sa neviete vmestit na systemovu particiu, pagefile ste presunuli & hibernaciu vypli & neviete co dalej, this might be useful..
http://support.microsoft.com/kb/2592038

To remove the Service Pack files from a Windows installation use the following in-box utilities:
Windows Vista Service Pack 1 installed: VSP1CLN.EXE
Windows Vista Service Pack 2 or Windows Server 2008 Service Pack 2 installed: Compcln.exe
Windows 7 Service Pack 1 or Windows Server 2008 R2 Service Pack 1 installed: DISM /online /Cleanup-Image /SpSuperseded or Disk Cleanup Wizard (cleanmgr.exe)

@command line alternativne (run as admin)
http://www.iishacks.com/2011/06/23/reduce-windows-7-winsxs-folder-size/

taktiez clekom fajn app.::
http://windirstat.info/

Disk Cleanup Wizard ftw! (: