How to free up disk space on drive C

We have been running Windows Small Business Server 2011 Essentials Sp1 for a number of years now without any apparent problems. We have noticed over this period, the free space on the 'C' drive diminishing over time. We are now at a point where housekeeping
needs to be undertaken to prevent disk space issues occurring in the future.
1) Is there an in-built utility that would identify what applications or directories are using the most space? If not, are you aware of a utility that could offer this functionality i.e. Treesize. Does Microsoft offer a utility?, maybe as part of Systernals?
2) The 'C' drive is 60Gb in size (I believe this was the default size during the install). When the server was initially installed, it had 20Gb free space on drive 'C'. At the point of writing, free space is now 7Gb. All installed applications and user shares
are pointing to a second drive (D). I'm assuming that the increase in used space is caused by log files or windows updates.
2) I've manually scoured the 'C' drive and noticed that folder 'C:\Windows\winsxs' is 10.6Gb in size. I believe this folder relates to Windows Updates. Are we able to carry out housekeeping on this folder? If so, please could you advise the correct way of achieving
this. The 'Disk Cleanup' utility only offers to clean up 1.2Gb which is not enough.
I hope someone can offer some assistance.
Regards

Hi LMG09,
Currently, please refer to following article and check if help us to recover Disk Space on C drive on the SBS
2011.
Recovering
Disk Space on the C: Drive in Small Business Server 2008
à
I've manually scoured the 'C' drive and noticed that folder 'C:\Windows\winsxs' is 10.6Gb in size
The Windows component store (C:\Windows\winsxs) directory is used during servicing operations within Windows
installations. Servicing operations include, but are not limited to, Windows Update, service pack, and hotfix installations. The component store contains all the files that are required for a Windows installation. And, any updates to those files are also held
within the component store as the updates are installed. Please also refer to following article and check if can help you.
How
to Clean up the WinSxS Directory and Free Up Disk Space on Windows Server 2008 R2 with New Update
If any update, please feel free to let us know.
Hope this helps.
Best regards,
Justin Gu
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