Can't read message text

[Lisa]

I am having a problem with my outlook program. Everything
was fine and then last night I turned off my computer wrong
and this morning I turned on my computer to read my e-mail
on Outlook and the three I recieved last night and openned
today were blank even though I know the messages had text
because I spoke with the people who sent them. When they
resent today they were fine....

Any clue what happened?

--Lisa