Guild Wars 2

I just built a new rig and need some help configuring to run GW2 without crashing.

Case- CoolerMaster HAF
MOBO- Sabertooth z87
CPU- i7 4770k
Ram- 16gb 1877mhz
GPU- MSI GTX 780 TF 3GDDR5 OC
SSD – Samsung 256gb
Windows- 8.1

Temps are below 30C, have benched the video card, and memtest everything is coming back normal, but I keep crashing in game. Some messages are as follows:

—> Crash <—
Assertion: activeBlock == MEM_BLOCK_NEXT(activeBlock->prevPhysicalBlock)
File: ..\..\..\Core\Platform\Common\MemAllocatorTLSF.cpp(461)
App: Gw2.exe
Pid: 5260
Cmdline:
BaseAddr: 00400000
ProgramId: 101
Build: 26908
When: 2013-12-09T04:40:43Z 2013-12-08T22:40:43-06:00
Uptime: 0 days 0:04:05
Flags: 0

—> Crash <—
Exception: c0000005
Memory at address c5340000 could not be read
App: Gw2.exe
Pid: 2912
Cmdline:
BaseAddr: 00400000
ProgramId: 101
Build: 26908
When: 2013-12-10T03:44:27Z 2013-12-09T21:44:27-06:00
Uptime: 0 days 0:22:46
Flags: 0

Everything else seems to be running fine, not sure what the issue is. Any help would be awesome.

It probably a driver issues in craptastic Windows 8 upgrade to windows 8.1 or better yet down grade to Windows 7. Windows 8 sucks for gaming at this point.