Upgraded PC system crashed, Win7 reinstall failed, hardware stopped..

Hi i have 3 yrs old Pacard Bell IXTREME X6620 UK. Over year ago I upgraded power supply to Corsair GS600 and graphic card to ASUS GTX560TI DirectCUII Top. After upgrade I reinstalled (clean) system and all was in good working order.
Last week my PC froze while browsing internet and the only thing I could do was hard reset. When I tried to restart the only way to get it to work was in safe mode with no internet connection. After I tried and failed with all repair tools and system restore I initialized clean system installation on C: (Windows7 no CD/DVD) using Pacard Bell system recovery tools. PC froze while installing fresh system. When I switch computer on I got the message: "Setup is preparing your computer for first use"....then the Error message: "The Computer Restarted unexpectedly or encountered an unexpected error. Windows installation cannot proceed. To install Windows, click OK to restart the computer and then restart the installation". Doing this only keeps repeating the error message. After trying all tips I could find in forums with no success I resigned to reinstall system yet again. That was tricky because my PC came with already installed software, no CD/DVD and with system refusing to boot I had no access to Pacard Bell system tools. I downloaded Windows 7 System Recovery Discs (http://msft-dnl.digitalrivercontent..../X15-65733.iso) and reinsalled system.
Problems I have now are:
#1 I have no access to internet: My integrated networking is not working (mother board ACER G43T-AM V2.0) and my WLAN card (WN5301A) looks like is dead- no flashing lights, system can't see any networking devices. What is happening?
#2 Currently I have Win7 installed through recovery disc that was not provided with my PC so I don't have access to some software/tools. How to access and install original Windows7 and other stuff that came with my PC?
Please help I am running out of ideas.
Thank you.

Check the hard drive with the manufacturer's diagnostic tools.
Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
Hard Drive Diagnostic Procedure

   Information

We always assume you have made your Recovery Disks using the OEM manufacturer's Recovery Media Creator app the first day you had your new PC.
& made the Startup Repair CD.
startup repair disc-create

Did you make the OEM manufacturer's Recovery Disks?



You can order OEM Recovery disks from your OEM manufacturer's website.
Most OEM's will ship Recovery DVD's for FREE, (may be a postage fee)

You can Order Acer recovery disks from here:
https://secure.tx.acer.com/RCDB/Main.aspx?brand=acer
or
Acer | Recovery Media
Check in Accessories
or check the main web site.
Acer Worldwide - Select your local country or region

Thanks Theog,
I have 3DVD set of recovery discs I made in 2010 that did not work when I had system problems.
I am running Hard Drive test just now and it looks like 2.5 hours still left..
I don,t really understand why there are problems with WLAN card AND integrated networking. I downloaded and installed drivers for mother board and card and nothing. Not even a blip of light from the card. Is it possible that some circuits in mother board are toasted and/or WLAN card?

I would do the vastly superior Clean Reinstall - Factory OEM Windows 7 using the installer provided and deleting all partitions during install.

Pay close attention to how drivers are handled in Win7 because it is different than XP. You should have your LAN driver on a stick or CD handy in case it isn't provided during install so you can install it and get online to do all rounds of Updates. All of this is explained in tutorial link above.