And / Or

[jack]

What do these mean?

1. I can't seem to read or write any letters with this application.
2. I can't seem to read and write any letters with this application.

[Tdol]

Neither mean that much to me- they are both grammatically possible, but don't make much sense- what are you trying to say?

[jack]

I'm am trying to say I have this computer program but it doesn't seem to be working.

What do these mean?
1. I can't seem to read or write any letters with this computer program.
2. I can't seem to read and write any letters with this computer program.