Computer is HP with XP. I was downloading drivers for my cell phone USB\ncable. After it downloaded it said I must re-boot for it to take effect. I\ndid this and now when it turns on there is a blank screen with a flashing\ncursor in the upper left corner. Nothing else. What can I do? I must have\ndownloaded a virus or something, who knows. How can I get it to boot up so I\ncan see what is wrong?