I try to reset iPhone 4 to "erase all content and setting" but it stuck on spinning wheel, help please.

Question

I have read things that can help me such as this:
wjosten
This solved my questionRe: Spinning wheel after 'Erase All...'
Jul 8, 2011 1:44 AM (in response to khosra)
Something has gone wrong, on a 3GS, the erase of all content setting should take but a minute or two.
You will have to force the phone into recovery mode:
Turn the phone off using the Sleep/Wake button, then the slide to power off. If you are unable to do that, press and hold the Sleep/Wake and Home buttons at the same time. When your phone turns off, release the Sleep/Wake and Home buttons. Then, leave the USB cable connected to your computer, but NOT your phone, iTunes running, press & hold the home button while connecting the USB cable to your dock connector, continue holding the home button until you see “Connect to iTunes” on the screen. You may now release the home button. iTunes should now display that it has detected your phone in recovery mode, if not quit and reopen iTunes. If you still don’t see the recovery message repeat these steps again. iTunes will give you the option to restore from a backup or set up as new. In your case, select NEW.
and when I try to put it to iTunes it give me a message saying" The iPhone software update server could not be contacted." PLEASE HELP. I just got this iPhone 4.
and also when I try to updated it like a month ago it won't work.

Answer 1

Sorry, you said I need to take it to the Apple Store to help me with the iPhone before I posted that. What do they mean: 
Additional Information
The “hosts” file may also be blocking gs.apple.com.
Select the hosts file (normally you can find your hosts file at C:\WINDOWS\SYSTEM32\DRIVERS\ETC).
Click the Edit menu, and choose Copy.
Then, click the Edit menu again, and choose Paste. There should now be a duplicate of the hosts file named "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7).
Drag the original hosts file to your desktop. If Windows needs your permission to continue, click Continue.
Drag the "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) to the desktop.
Right-click "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) and choose Open. You may be prompted to choose the program you want to use to open this file. Double-click Notepad.
When Notepad opens, click the Edit menu and choose Select All. Then from the Edit menu, choose Delete.
From the File menu, choose Save. Close Notepad.
Drag the "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) file from your desktop back into the original location. If Windows needs your permission to continue, click Continue.
Right-click the  "Copy of hosts" (Windows XP) or "hosts -Copy" (Windows Vista/7) file, and choose Rename. Type "hosts" (without quotation marks) and press Enter.
Restart your computer and try connecting to the software update server.