The idea that a "cure" for any type of cancer would only be on one laptop is absurd. It may work in a movie plot, but in real life, no way.
At best it would have info on how to possibly, vaguely minimise the suffering in some situations. Cancer is not something that one brilliant researcher can "cure" alone.
How much time have you spent around cancer researchers? I can assure you that many of the most brilliant scientists I know are all almost entirely computer-illiterate.
If I had a dollar for every lab computer I've seen whose desktop is full of a few dozen Excel files ("data1.xls", "data2.xls", "new data.xls", "jim new data.xls"...), I would never need to apply for another grant as long as I live.
At best it would have info on how to possibly, vaguely minimise the suffering in some situations. Cancer is not something that one brilliant researcher can "cure" alone.