The volume is 30GB. The winsxs is huge, and yes, I have whittled it down using the well-known cmd-line method. And, I really don't have that much installed. I did go through with WinDirStat and was able to get rid of a lot unnecessary tidbits, MSI installation files, a few temp files, and several orphaned semi-data folders in the personal folders. Now, I have just enough room. I hadn't thought to move the program file folders temporarily, as it sounds a bit dangerous.