Windows OS supports the conversion of a FAT volume to a NTFS volume without deleting the files on the drive. We can do this using the command convert. You can find syntax below.

convert drivename /FS:NTFS 

Example: To convert E: drive from FAT to NTFS, we can run the below command.

convert E: /FS:NTFS

Adding /X switch forces the command to unmount the volume if required.

To reduce the size of the component store directory, you can decide to make the service pack installation permanent and reclaim used space from the service pack files. However, if you make the service pack installation permanent, the service pack is not removable.

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)DISM.exe /online /Cleanup-Image /spsuperseded

Checkout http://blogs.technet.com/b/askpfeplat/archive/2014/05/13/how-to-clean-up-the-winsxs-directory-and-free-up-disk-space-on-windows-server-2008-r2-with-new-update.aspx