Windows 7 x64 freezes while playing World of Warcraft

I recently installed Windows 7 x64 RTM. I install only the driver of my wireless card D-link DWA510 via Windows Device Manager. No surperflux. Everything is recognized.

Installing WoW + 2 extensions. Starting the game, the downloader for the patch management will freeze at 10 ~ 12% systematic. Reboot manual. I reinstalled it once again.

I relaunch the game and started updating. And the freeze, systematically impossible to get into the game, the loading bar is full. But nothing. So manual reboot.

Has someone an idea or feedback why Windows 7 x64 freezes while playing World of Warcraft?

Config.

ASUS P5Q P45 Chipset Socket 775
Core2Duo E8400
2 * 2GB GSKill PC8500 PK
4870 1 MB Golden Sample Gainward
Windows XP Home SP3 32 bit

Already tried
- Disable the windows firewall
- Disable notifications related to user account
- Installation of graphics card drivers catalyst 9.9 x64
- Test connection by rj45
- Performance test system windows ok

Launch Conditions wow
- Ds program directory \user\public
- Launch with administrator access
- Launch in compatibility mode Windows xp sp3
- Launch WoW repair.exe

All these actions have produced the same result at the same time. Graphics card worked very well under Windows XP and wow.

Several possibilities:

- Energy management position in high performance
- Update the chipset of the motherboard
- Disable aero
- Change ram voltage a priory windows 7 seeks unduly the memory controller, making the system more or less stable at a certain moment
- ATI driver bug

Reset all your voltages to their defaults. For login problems, Blizzard recommends to merge your Wow account with an account on battle.net. To see before accusing Window 7 64. Try also to go through the installer from Blizzard to see that if you are in managing your account. Also turn all your addon and wtf folder. Even I play wow on Windows 7 under 64 without any worries.

For your information, the processor is not overclocked, value is [Auto] in the bios. I have a battle.net account and I can log on in WoW. I can see the list of characters when I click on "enter the game" at the end of the bar loading, than it freezes. The sound freezes too! The wow installed is clean. I also tested removing the dir cache /WTF/interface and launching a repair.exe

Yesterday, I even updated the chipset and RAID controller driver (I'm on SATA) and turned on maximum performance for power management. Also updated the realtek driver from the motherboard. Now I am planning to mount the machine in XP mode and run wow. We'll see how it works.