I am dreaming that my computer is down and I can't get it to start.
Two men in uniforms come into my den and ask if they can help and I say yes. By the way they talk I know, or think I know, that they are in the
military of the UK. The terrorists are attacking all computers and they want to help me. The younger one looks at my computer and then the older one tells me that the microsoft instructions are written in American english and it gives them rather a problem. I reply that I did not know that.

At this time my wife calls for me to wake up and I have to get up.
I don't get many dreams, that I can remember anyway, and so I note even this short one!

It sounds like the dream is about a miscommunication in your life (A computer is used to transmit information; men can't understand instructions in American English).

You could feel that something in your life isn't working out because of a misunderstanding.

Your unconscious could have been using the symbols of uniforms, terrorists, microsoft because you had been thinking about these things, maybe reading about them or watching stuff about them on TV.