Why can't I log into windows 7??

Okay look, last night I spilt coffee on my laptop just a tiny drop doubt it woul have effected the insides or whatever but any way this morning I managed to log on twice then I accidentally shut Down now I can't log on to my computer. Someone help?

Press the F8 key repeatedly at boot up or use the Startup disk.

Try this:
Safe Mode
Startup Repair
Note: You may need to do startup repair 3 to 4 times.
Startup Repair - Run 3 Separate Times
System Repair Disc - Create
System Recovery Options
System Restore

Thanks mate I managed to get it in the end my keys are really sticky now for example when i press enter .9 comes up, when I try type a collon I get a semi Collon when I hit y I get 'y&8' it's quite annoying and has actually upset me cause I only just got this laptop. I hope Sony centre will take and fix my laptop. If they say no I will have to kill them I think...
Anyone had of similar problems and have taken it to a repair warehouse?