Help

Try logging in to minecraft.net, if you can then just keep trying it will work.

If you can't, recover your password and choose a more secure password this time.

Hmm... happened to me before, try downloading the minecraft. folder again or just minecraft.jar. If that doesn't work, see if you can even log in on minecraft.net...
And if that doesn't work then turn off your modem or take it out of the USB port if you have a dongle and set it up again, if that fails then I can't help.

ok i will login but then i will say login failed and i will try again and it will do the same thing and it started today and could it be the laptop

A LITTLE more details?