Not so quick help. Computer related.

There's nothing "quick" about this. Wish I could help, but my experience in water damage is...........................well................................................zero. Sorry to hear what happened though :/

Salvage is only thing for u. microChips (CPU) r basicly addicted to water.. then only thing u cand do is change them

I'd suggest checking for obvious defects for every compontent and carefully cleaning them. Test every component that looks okay in another computer and rebuy the rest

You need to isolate each component by using them in a different machine to see which component(s) are failing.

Water is generally moist :D

Take out each component, and test them one by one in someone else's/friends PC.

at least it didn't grow fungus :P
and yeah as others said isolate each hardware and try them on other computers.

my first suggestion: remove the computer from the room :P

no but in all seriousness, you should clean up each component very carefully and check to see if they even look like they would work (e.g. pins bent/rusted etc.)

the hard drive should be fine since it is vacuum sealed, unless it is SSD in which case take it to someone to get it checked out.

the majority would be just a case of wait until every last droplet has dried and test individually to see what still works

straight up, buy a new computer case if you plan to make the computer work again.

give the room a good clean, if possible, as well as it will help if you plan on using a computer in that room again.

hope this helps at least a little bit :)

like most said, remove all components first. then I would go to each part cleaning them all off with rubbing alcohol, including the thermal paste under the processor (will need to get some more when you reinstall the heatsink onto the processor, but its pretty cheap at radio shack)

I'd clean the parts with distilled water, pure, no alcohol, much faster and cheaper. But, don't think anything can be saved, to be honest, maybe one or two parts.

This made me think about what could have happened to the PC I left in another country, for over a year now.

try installing linux, i hear it solves everything

If there is mold growing inside the computer, I recommend you keep feeding it to create a biomechanical entity which will ultimately enslave the human race.

You'll have to replace most parts. If you left it to rust, there's nothing you can do! Hard drive should be fine. But when you mean humidity... you mean you left it in a damp place. Not like in a house with 70% humidity or something.

try to restart your pc

Chances are if you check all connectors, clean stuff a bit and dry everything up it will work okay, although salty water definitely doesn't sound good. Doesn't your machine start at all? Normally your motherboard should boot and then give some diagnostic beeps or some diode flashing (depends on model) if it doesn't like something.. I'd actually start with checking power adapter and BIOS battery. Of course, AFTER everything is dried up and cleaned.