I notice sometimes Microsoft Update just adds new updates and doesn’t delete the new installation.
For example Windows XP SP2 (old) update Windows XP to SP3 (new), the old SP2 installation is still there, but I’ve already updated to SP3.
Another example: Microsoft C++ 2005 (0ld) and Microsoft c++ 2010 (new) installation.
Could I delete the old installation to save some space? If not what’s the reason? Thanks! :)