That is, both more detail and somewhat clearer English.
"Cannot access c:-drive". How do you try? What happens? Assuming that the c:-drive is the drive where Windows is installed: can you boot from it, and how far does it come?
"Tried to reinstall XP". What kind of install (clean install, repair install) from what source? Did it work? Did it fail? On what point? What exactly happened?
"On startup it shows three lines of media center xp". What exactly does it show? What happens then?
i have p4 dualcore, Windows Media Centre installed, 160 gb hd, 1gb mem. cannot access c drive, tried to reinstall XP. on shows startup shows three lines of windows media center xp. How to correct this problem? and access c drive from My Computer.