Laptops come with 1 Terabyte of disk space. Lots of space for Microsoft Windows 7 to use to generate and store CBS log files in C:WindowsLogsCBS folder. Searching on Google, revealed that this folder can get really large and leads to most space consumption on computers with little hard disk space.
Unfortunately, some of us have lower capacity hard disks of 160 GB, which is just not enough to satiate the appetite of SFC.exe to continue generating CBS log files, without clearing the older ones.
If you are in a situation where you need to make some space on a resource-strapped Windows 7 computer, then open Windows Explorer, navigate to the folder at C:WindowsLogsCBS and delete all the files, except the latest one.
That way you get more space.