[SOLVED] Ethernet Controller drivers for this device are not installed (Code 28)

My Acer Aspire (previously Windows 7 Home Premium) was a sluggish computer, was too many useless programs I have installed. I wanted to start all over and reinstall Windows 7 using a disc. I did a Windows 7 professional custom installation, and my Acer was like brand new, but the problem is, I cannot connect to the internet using wi-fi or ethernet. I checked Device Manager and I saw under the Other Devices tabs that Ethernet Controller, Network Controller, and PCI Simple Communications Controller have the yellow triangle with an exclamation mark. The status for the devices say The drivers for this device are not installed (Code 28) and everytime I try to install driver the device driver software was not successfully installed. Any ideas to fix this without opening out my laptop? (very risky)

Processor: Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz
Installed Memory (RAM): 4.00GB (3.68GB Usable)
System Type: 64-bit Operating System
Windows 7 Professional Copyright 2009 Service Pack 1
Acer Aspire 5742/5742Z/5552/5336/53252 Series (Don't know which one)