Computer Craziness

I sent my computer to HP a few weeks ago. This is the third time I have had a 9 month old computer serviced. It has already done a "disc check" since I got it back this morning. It is so frustrating. It is likely they will be sending me a new one very soon.
Now - weird situation with my blog - if I use IE to view it - I get a little white square with a red X in the box where the header should be. If I use Firefox, I don't have anything - not even the space where the header goes. Please tell me what you see when you view this blog - it is all so strange!