My sister's MB refused to boot yesterday, so I repaired the drive. It seemed to be OK, but when I was gone, thinking it would work, it prompted her to insert disc 2. Shortly put, it has installed 10.4.6 over her previous 10.4.11 system. The data has all gone in the "Previous systems" folder in Macintosh HD. I ran software upgrade several times (it's still downloading java, as of now, for the [third] fifth time), I managed to get all her data back (playing with the permissions), but now, there are 3 different Applications folders. One in her userspace, one in the "Previous system1" and one in the "Previous system2". Can I safely delete these Application folders? I would guess they are copies, and not hard links, but after having accidentally started wiping a hard drive because of a hard link (no laughing please ) once, I don't want to see all her apps disappear. When I search for an app, it appears only once in Spotlight. The same goes for the "Microsoft Office 2004 test drive". Can I delete this, as she also has the real version installed in her Applications folder?