Okay, if you spill something over your keyboard you should turn it off and remove cd or dvd drive if you have one, batttery if you can, if you cant remove the hardware or dont know how to and turn it upside down. And for precaution, not needed, put a few paper towels inbetween the keyboard and screen. And wait at least 24 hours, if not more. Also make sure the power cord isnt connected.
Actually had this happen to an old laptop of mine, when soup spilled on the keyboard, did the above with the dvd drive/battery removing them, (didnt know how to take it apart to take out the components let alone where they were to put it back together), it still worked just fine but had to use an external keyboard, and yes i know this is offtopic in this paragraph.
As for the weird things, it could either be software bugs or hardware damage, or a mix of them. Or your computer might have been affected for a bit and getting mixed signals. From what you describe it may be a bit unreliable, and fail at any point but seem fine, but maybe not, and there might possibly be hardware damage. Have you noticed anything weird or any issues with speed/performance/glitches and such? This would be handy to know, as this can help people tell if theres hardware damage or not. If ANYTHING (sorry for caps) such as glitches or weird things even remotely related or not related post them as this may help.
Also was what you spilled sugary or sticky in any way? That tends to be more abrasive on hardware.
As for supicions of viruses or malware, this is a possibility, and these also could be sypmtoms of that. But I am not really that skilled in that area except for scans and security to help prevent those infections, and identfying symptoms, so if i were you i would let someone else help in that area if that is the case.
