|"...loss of data." This usually refers to files and especially newly created files that are open at the time.|
Start it again and tap F8. This takes you to the advanced boot options window, if it stays on try choosing 'last known good configuration' and seeing what happens. If it did not stay on either your battery is dead and your power cord it bad (try first with power cord but with battery removed to rule out a shorted battery cell), or you have a hardware problem.
Report back results for more advice.
You have to be a little bit crazy to keep you from going insane.