Song lyric screen spits into 4 sections and only show one or two sections occasionally.
If that computer is running off of the integrated graphics that could easily cause issues such as this as it doesn't even come close to meeting even the minimum specifications to run EW 7.3.x.x.
The easiest way to tell if it's a corrupted database would be to use the Profiles Manager (found under the Profiles tab in the menu) to create a brand new profile and switch to that temporarily. Add in a fresh/new copy of some of the songs in question and see if that works okay or has the same problems. See the link below for information about Profiles.