Maple Overheat, and flash problems.

So yeah, my PC is really for the pineapple.
I got this problem scine a long time already:
When I play Maplestory, after 2~3 houers, it overheats and crashes. Other games (Wizard 101 as example) have this problem too, but some don't (NFS World).
But the thing is: It only overheats at when I'm playing the games! I could be on the interwebs all day long, my PC wouldn't heat over. :f6:
I also got a secondary problem:
My Flash player.
That or something is what it has to be!
As example, I can play for 45 minutes Maplestory Adventurers. Then my PC crashes.
BUT.
It didn't overheat.
It wasn't even over the averange heat!
The same is with other online games, no matter if they're multiplayer or soloplayer, facebook or your averange gaming side.
Problems were kept with updates on Vista, and after upgrading to 7, after updates, still no real fix.

I had a Windows Vista 32 bit, and upgraded to Windo'h 7 32 bit, SP1 currently.

By the way: it started a long time ago, and before anyone says the Maple story problem is because of the air vent thingy:
It's clean. And I actually moved it like it should get a SHITLOT of air.

So I'm requesting some help here. It gets boring to put water bottles on top of my PC tower. :c (Yeah, that actually helps at the Maplestory problem, a bit)

Your PC overheats while gaming because it makes the PC work harder obviously -> more heat generated.
If it overheats, you need better cooling :l
As for the crashes, no clue.

Your PC overheats while gaming because it makes the PC work harder obviously -> more heat generated.
If it overheats, you need better cooling :l
As for the crashes, no clue.

Funfact:
It worked before. The overheat thingy came out of tha blu.

I believe we share similar problems..

Here lately I too have been experiencing maple crashes constantly . But before the crash i experience a heavy lag spike where I could be frozen and or standing there in atk stance for a good 10mins or so. I find it so annoying and it makes training really hard...

This used to be a problem for me on my laptop (turned into a heatbrick when I played games for a while), but I got a little lapdesk thing for it that has two large fans that do a great job at cooling it down.
Upgrade your fan, maybe?
If you don't want to lose your computer for a week or two, go get a decent sized fan and aim it at the back of your PC, or wherever you think it'll cool the computer off best.

Update on situation:
Now my MS is effed up compleatly.
5 minutes after I choose the character, my PC crashes. And it only got averange heat, so overheat can't be the problem. ._.