HOW CAN I REPIAR MY CORRUPT WINXP

[misan4u24]

GOODDAY PALS, I THINK MY WINXP OS ON MY LAPTOP IS CORRUPT;IT KEEPS RESTARTING OVER AND OVER.PLS ADVICE ME ON WHAT TO DO NOW ,BECOS I HAVE SO MANY DOCUMENTS & SOFTWARES ON MY HARD DRIVE.WHEN I REMOVED THE HARD-DISK TO SLAVE IT ON MY DESKTOP USING THE IDE TO USB CABLE{WHICH ARE MOSTLY MEANT FOR LAPTOPS} AND THE SYSTEM WILL ONLY INSTALL THE NEW HARDWARE; BUT CAN SEE IT AT ALL WHEN I BOOTUP MY LAPTOP.SO CAN ANYONE PLS TELL ME WHAT TO DO?

[nitroshift]

Boot off a Windows Xp install cd and select repair when presented the choice.

[Tarun]

You should try to boot into safe mode.

Also, it'd be a great idea to check your CapsLock key, as it seems to be stuck.