SCCM OS deployment errors ERROR_INTERNET_TIMEOUT

I have seen lot of  queries regarding SCCM 2007: OSD deployment errors out within a few seconds after WinPE loads and then automatically reboots

As per my understanding there could be two possible reasons depending upon the error.

1. Network access account

winhttp; 80072ee2 means ERROR_INTERNET_TIMEOUT.

This account is needed during operating system deployment, because the computer receiving the operating system does not have a security context it can use to access content on the network.

See this article for how to configure network access account:

How to Configure the Network Access Account

http://technet.microsoft.com/en-us/library/bb632397.aspx

2. There could be problems with NIC drivers

http://blogs.technet.com/b/smsandmom/archive/2008/08/26/configmgr-2007-osd-deployment-errors-out-within-a-few-seconds-after-winpe-loads-and-then-automatically-reboots.aspx