I am trying to make some space on someone's Windows 7 system. I started by looking for "Huge" files and cleared out lots of rubbish. I wondered what the following files were and whether I can safely delete any or all of them? DataStore.edb C:\Windows\SoftwareDistribution (1.2 GB) NetFX_Full.mzz C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache (200 MB) [email protected]_blobs.bin C:\Windows\winsxs (190 MB) ed4d7 C:\Windows (185 MB) Data1 C:\ProgramData\Adobe\Setup (167MB) Also . . . What are the 1.4GB of files in the (hidden) directory "Installer" under C:\Windows\. Many of the sub-directory names start with "MSI" and end up with ".tmp-"? What are the various MRT files? What are all the AMD64 sub-directories? How do I clean up the WinSXS (Component Store) folder in Windows 7? Dear merciful God, Windows does like disk space,why can't it "clear up"? . . .