Solve : PC won't load! HELP URGENT!?

1.	Solve : PC won't load! HELP URGENT!?
Answer» I tried to load up my computer (emachines 390) and it keeps restarting when loading windows xp. It finally got onto windows main menu, so i saved some of my files to cd and decided to reboot windows by putting in the RESTORE cd's that came with it. When i try to load it now, the windows loading page thing comes up and then the TOWER makes a sound like it is shutting down and it restarts. Its not a sound from speaker, just can hear the computer FAN or something slowing right down. Do i have a hardware fault or something? please reply asap, i REALLY need my computer boot to safe mode hit the f8 repeatedly then go to control panel/system/advanced/settings >STARTUP and RECOVERY>/system failure/uncheck-automatically restart. what ram have you got also any beeping on startup..

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