cant boot in to my compact laptop even cant detect xp cd but others cds can detect them i want to back my information before worst happens please hellp

If it wont boot then the worst has already happened. You should always always always back up all data that you cannot loose on a regular basis.

Please explain the symptoms of your problem properly, "cant boot" doesn't give us any useful information to work with.

display 103-charge circuit failure once its loading then this message
window could no start because of the following file is missing or corrupt:
<windows root>\system32\ntoskrnl.exe.
please re-install a copy of the above file

display 103-charge circuit failure once its loading then this message
window could no start because of the following file is missing or corrupt:
<windows root>\system32\ntoskrnl.exe.
please re-install a copy of the above file

That is caused by either data corruption or a malware attack. A repair via a windows install cd may work, but most likely, you will need to do a completely new install.

why 103-charge circuit failure am wondering