i am using a presario cq56.my son installed window7 ultimate.I can no longer type as before.The verticle typing line jumps all over the page when i hit a key

This site (LinuxQuestions.org) doesn't generally deal with Windows problems, so you may get better help on a Windows forum. How did you end up here in the first place?

That being said, someone here may be able to help, but you're going to need to give more info. What do you mean by "vertical typing line"? Do you mean the cursor? Also, does this happen in one application (e.g. a word processor, web browser, etc) only? Is the machine a laptop? If so, is it possible that you're inadvertently pressing on the touchpad? Perhaps you had it disabled before and Windows 7 has enabled it?

Your son installed a bad virus known as M$ windows the best suggestion would be to re-install Linux ASAP ;P

I'm not even sure the OP knows what Linux is. In any case, since it has been almost a month since they posted, I'm not optimistic they'll return.

Just caught this and had to put in a remark ... a bit of tongue in cheek if you will

Serious answer: check your keyboard layouts in Regional Settings.