Why Is My Computer Running Slow

black screen appears right after startup and the computer freezes. The system recovery button does not respond at all. Only button that works is F1, which trows me into setup where I have no clue what to do. system is a: HP Pavillion, with a 64 X2 Dual Core Processor 4200+ running on a Windows XP home edition, which were already installed on the computer when I bought it, so I do not have an XP installation cd. The message that appears just before the screen goes black says: “Realtek RTL8139(X)/8130/810X Boot Agent Press Shift-F10 to configure ………”

total sceen recorder gold free full no crack needed. pls seed and sub if works. ill seed it whenever i can! sry for slow computer