How to prevent random crashes?

[Ryuhou]

For a while now (well over a year) my client crashes occasionally.
At first that was only when changing blocks. Then sometimes when putting up items in my shop. Recently I crashed when looking at the fashion catalog.
And now I just crashed while typing in chat.

Does anyone else have this problem?
Does anyone know what could cause this?

I often have MPC, chrome, and/or Firefox running as well but I crash only occasionally, sometimes a few times a week, sometimes not for 2-3 weeks.

I'm using Windows 7.

[final_attack]

Try doing file check?

Mine's also crashes a lot. I had to do File Check and redownload entire GameGuard for much less chance for crash ..... every time I want to play / PC got shut down (even from black outs)

I believe it's from corrupted data on accessory ...... since if it crashed then I went back in-game ..... it's most likely crash in same block and position as before (I remembered same group of people before crashing again).
It's not crashing on other block (same position + more person on screen (different people)).

Dunno what caused it though.

[Shoterxx]

Try doing this:

Open PSO2 Tweaker -> Exclamation Button -> Other Tasks -> Enable Large Address Aware

[Ryuhou]

Wow, I didn't know PSO2 was only using 2 GB.

Edit:This changes absolutely nothing. I crashed out of nowhere when Quna's concert was close to ending. I didn't even touch my gamepad, just stood in the lobby watching the show.
WTF is happening?