Seems to be cause by the ZTE USB Modem/Serial Device Driver, 3G USB modems/access points/dongles have known issues with Windows 7. You should remove this device.
Be aware that the current VISTA driver is NOT certified for Windows 7 as it dates back to 2007. ZTE doesn't even provide any updated drivers so you're out of luck.
If that does not fix it you should contact the manufacturer for a fix as this is a known issue. I do not recommend using wireless USB devices. Especially in Windows 7 systems. These wireless USB devices have many issues with Windows 7 and using Vista drivers with them is almost sure to cause a BSOD.
I'd recommend using ethernet instead of any problematic wireless card.
fffff880`08b8e000 fffff880`08ba9880 zteusbser (deferred)
Image path: \SystemRoot\system32\DRIVERS\zteusbser.sys
Image name: zteusbser.sys
Timestamp: Wed Apr 11 06:40:50 2007 (461C4AB2)
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4