Windows 7 crash Perfect World International

I just started playing Perfect World International
and it was all working good till 2 days ago
Then when im playing it crashes after like 10 minutes
Then i have to shut down my pc
I turn on my pc and i get blue screen with the message
BAD_POOL_HEADER
It restarts my pc and gives me blue screen with the message
MEMORY_MANAGEMENT
it restarts my pc AGAIN and it works normally but it all
starts over when i try to play Perfect World International for like 10 minutes
i have tried to reinstall but it didn't work
ANY HELP PLEASE????

P.S.:i tried on my laptop and it worked good but there
was way too many lag....

Oh....
You don't need to reply unless you know WHAT did it
It kinda fixed it self
Its working again
But if you you WHAT caused the problem please
do say because i'm still very curious