client randomly closes without and warning/lag, no error message.

Mainly when bossing, my client literally just shuts off randomly. No lag prior to crashing, no error messages, it just closes. It has happened in 2 krex so far and 2 CWK and basically made me waste all my time and energy for nothing in the boss runs cause I can't even reap the benefits before the client closes. I reinstalled the game completely, all drivers up to do date. I am using an nvidia card

 

i experienced taht too, not that common, but already 3 times in 4 months too

 

it's every time i boss for me

 

have you checked your antivirus? Since those have scheduled scanning, that may be the cause or your computer is a potato and can't fully handle the graphics during bossing. Just my guess.

 

These would not cause him to DC during bosses.

Contrary to popular belief, older/worse computers actually run our version of MapleStory better/more stable than newer/better computers do, and specifically graphics cards more so than other PC components. Sadly we could grab an old suitcase Dell with one of those massive CRT monitors and it'll be far less likely to DC during bosses than the most modern high end 'gaming' computer.

 

I usually close everything else, but Royals and pray that it won't DC. Also, I find more success with full screen as well.

 

If you use an Intel CPU with built in graphs try disabling your GPU driver before launching the client.

 

I have a high end gaming pc and yes i agree it actually runs better on older pcs, i always run fullscreen, and onboard graphics is disabled, and i always run admin mode