One very last resort ...
If you can still read the books on the main computer, you should be able to DRM strip them using a program such as epubee.
You will then be able to read them on any device.
I do NOT advocate using such code to get around the valid limitations placed on a DRM book.
However, where the problem arises only because of the ineptness of Adobe's ADEPT DRM infrastructure and its implementation,
such a measure is totally justifiable.