Computer boots slow = bad battery?

[Betty]

Originally Posted by Moonliner

At what point is is slow?
- Before or After the windows splash screen (or both)

Does it hang for a bit at some point and then resume?

Once it boots how does it run?

It's slow before the splash screen.

It shows a Dell logo then goes black for 3-5 minutes... shows a blinking cursor for about 30 seconds on a blue screen.

It used to boot up lickety-split in less then a minute- and now takes 5+ minutes. Nothing has been installed or done. This is a computer that runs a cnc in the factory and that's all it does. ever. nothing ever changes on it.