Xp won't boot

Hello,
There is a blinking cursor in the upper left hand corner of the blank screen after the BIOS and before Windows.
If I unplug my USB cord with the printer attached everything boots fine when I plug in the USB printer cable and restart the computer it goes into a blank screen with that blinking cursor.
I have updated the printer drivers
I have updated the USB drivers

Its not the printer it works just fine with my other computer with Vista on it. I had it set up with the Vista Comp as a default and was using the network to print from my XP.
Now I want to set up My XP as the default and network to the Vista.
Everything got messed up after the Time Warner people came . I just moved and re did everything I had set up, I am trying to not do a fresh install.
Does anyone have any suggestions?