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Winsxs is huge… Free up a few Gigabytes with dism
I was running out of disk space in C: and was unable to install a small software that I needed, so I decided to clean up a bit. For that I like using WinDirStat http://windirstat.info/ which very quickly allows you to find where the big files/folders are. In this case I found that my c:\Windows\winsxs folder was over 12 GB of size. One way to reclaim some of that disk space is to cleanup all files that have been backed up when a Service Pack has been installed. To do that in Windows 7 you can run the following DISM command: