multiple errors upon bootup

My sister-in-law has a Compaq Presario 4504. She has
Windows ME Millinum Edition. When you turn the computer
on, once it gets part way through startup, there are
multiple error messages that keep appearing. As of yet, I
have not been able to even access any files. The cursor
just hangs in working mode. A few of the errors are as
follows:
error loading powrprof.dll
an attempt was made to load a program with an incorrect
format.
systray has coused an error in Kernal32.dll
systray will now close. If you continue to experience
problems, try restarting your computer.
explorer has caused an error in MLANG.dll
explorer will now close. If you continue to ......
Rundll32 has caused an error in unknow. Rundll32 will
now close. If you continue .....
error loading powrprof.dll.
a dynamic link library(dll) initialization routine has
failed.

I am somewhat computer savvy, but I am at a loss as to
what is going on here. I have also never delt with
Windows ME. Can anyone offer any insight as to what I
should do?

Thanks!