As SwedishChef says, you need to spell
and grammar check it. Nothing puts me off more than bad grammar on a supposedly "professional" website:
In reply to:
...If your in a bit of trouble with your computer don't hesitate to contact us for free support....
Try "you're" as it's the correct contraction of "you are" which is what
you're trying to say!
Otherwise it looks ok besides what others have pointed out.
I also think the block of text "what we do" needs to be in a bigger div - it's very small at the moment and requires a lot of scrolling to read a fairly small amount of text. Make the logos and banner a bit smaller, and the text area bigger.