Latitude E6420: How to do clean Win 7 install on new drive without Drivers Restore CD?

I read the Dell System Recovery sticky and I'm not sure it answers my question...

I have a Latitude E6420 running Windows 7. I installed a larger hard drive today and put the original (working) drive in an external USB enclosure. I wanted a clean install of Windows 7 on the new drive so rather than use a drive migration utility I used the Dell Operating System Reinstallation DVD. When it was done I discovered that it didn't install any drivers. The network drivers aren't installed, so I can't download the drivers from the internet, and I don't have the Dell Driver Reinstallation CD.

1) Is there a way to use the Recovery Partition on the old drive (now in the external enclosure) to do a factory fresh install on the new drive?

or (maybe even better)

2) Is there somewhere I can download an .iso file for the second E6420 recovery CD (containing Drivers/Factory-installed Apps?)

or (least desirable)

3) What drivers would I need to download (on another computer) and manually transfer/install to the E6420 via an external USB drive so I can connect over Wifi to download the rest of the drivers directly onto the E6420?

Thanks for your help!

 

drivers can be found here
Drivers and Downloads | Dell [United States]
i suggest that you need network ones for your purpose.
but i think , better will be instaling drivers in"correct order"
How to Download and Install Drivers in the Correct Order | Dell

 

Yes. The original OS image is stored at x:\Dell\image\factory.wim, where x: is whatever drive letter your current system assigns to the Recovery partition on the original HDD. You can restore that image onto your new OS partition with the imagex.exe utility.

Unfortunately, Microsoft makes you jump through hoops to get imagex.exe, even though it's free. You have to download the entire, massive WAIK ("Windows Automated Installation Kit") from Microsoft just so you can extract the tiny 400KB utility from within it.

It sounds like you still have the original HDD accessible to your new build via an external USB enclosure?

If so, grab the x:\Dell\Drivers folder (where x: is your original HDD's OS partition) and copy it to c:\Dell\Drivers (your new OS partition). Inside the Drivers folder should be a bunch of Rxxxxxx subfolders. Open each one and run its enclosed setup.exe routine.

The R.. folders are the drivers installed on the original OS installation. Anything you find there will be a driver relevant to your particular laptop. You can rummage around the folders to figure out which device each driver goes to, or you can follow Lnd27's link and match the R-numbers for each driver.

There are a range of possible wifi cards your laptop could have, so we can't tell you which wifi driver you need. But if you check the "Network" subsection of Lnd27's link and see a R-number that matches something in your c:\Dell\Drivers folder, that will probably be the right wifi driver for your device.