The driver which is being blamed for the DRIVER_POWER_STATE_FAILURE stop error is the L1E62x64.sys.
The L1E62x64.sys appears to be a driver for an Atheros ethernet controller.
You can try updating this driver.
However, if problems persist, as you have ZoneAlarm installed, consider that ZoneAlarm drivers may be at the root of the issue as reported in the following thread:
http://social.answers.microsoft.com/Forums/en/w7hardware/thread/d10e3bcd-6a57-42f5-b0e0-7ad11c267c90
Consider uninstalling ZoneAlarm and see if the BSODs resolve.