I was working with a customer who called in a disk space issue. I ran SpaceSniffer and discovered there were 92GB of files in a temp folder and nearly all were cab files.
My research discovered that on Windows 7 64bit and Server 2008 R2 the makecab.exe utility breaks whenever a log file is over 2GB. The problem is that the cabinet file format cannot store files larger than 2GB and it breaks the compression process as a result. Consequently all new logs created afterwards never get created properly and C:\Windows\Temp fills up with corrupt cabinet files; as much as 200MB+ a day.
The only solution is to delete all of the corrupted cab files from the temp folder and the initially corrupted log file in the CBS folder. Here is a link to the article explaining this issue.