win 10/win7 update for 2 win7pro oem+ 2 win7home retail pc to update

Yes, I have my product keys for all 4 versions.
2 win7pro oem 64bit, Only 1 disk for pro, other I seem to have misplaced at the moment.
+ 2 win7home retail 1- 64bit, the other dell 32bit pc .recovery disks for the 2 home ver. with all the extra crap they cram into retail pc's.


Objectives:
1. maybe a clean install on all 4 pc's, ( yes, I will make backups and additional copy for safety).
2. Run win10 check prior, to see if any issues, might be with the old dell home dual (for email only), and my six core win7pro.
3. If no issues found, run win10 on all 4, while still available for free upgrade.
4. if problems found, revert back to win7 for the affected dell pc and my older six core win7pro.

Does anyone have any useful suggestions?
A.) Is there a way to download the win7pro with all current updates onto 1 pc, then prior to activating it, copy it over to the other win7pro pc ( I will install ssd's into pc's.) use hd's for data and backups.

B.) do the same with the retail pc's,as A.)

Then activate both with their own different unique product keys that I have. Bought both oem at Frys.
(Yes, I have my separate product keys for the each respective pc.)

Hi Wade,
this tutorial WILL be of interest for you
Windows 10 - Test & Try with No Risk, No Install

Roy

Thank you for the info.

The one win7pro disk i still have, seems to be scratched or otherwise bad.
Yes! I do own two legit, registered, ms confirmed, prod. keys.
Short of have to buy yet another disk is there a work around?

Hi Wade,
Download Windows 7 and 8.1 ISO Images from Microsoft - gHacks Tech News

try the above link

Roy

Thank you ThrashZone,

Downloaded win7pro64. I'll need to do the same for the home retail ver.

After reading the 3 links, I'm not sure if I understand it all at first glance, I'll reread it a few more times.
Been with win since ver 3.0, MS never makes it straight forward, Have no idea why the just don't have a latest version,
with all the security updates and patches to the current day you download it.
Just seems to make more sense to me, and save all parties involved all the extra BS and band width, not to mention the hassle. Just saying!

KB3125574 contains all the security and non-security fixes released since the release of Windows 7 SP1 that are suitable for general distribution, up through April 2016.
It’s single, Multi language, 488MB update file (msu). On a recent installation, you must have first to install KB3020369.
For more information read this article: https://blogs.technet.microsoft.com/...ows-7-and-8-1/

If you want to have the same Windows 7 installation disk for multiple windows 7 brands, rename \sources\ei.cfg to \sources\ei.cfg.orig. When installing windows, it will ask witch brand you want to install. Of course, the related key must be used.
Normally the one license can be used for Win 32 or Win 64.
Why don't you use the factory recover BIOS option?
I've already did what you intended to do: On one laptop I've installed Win 7, all drives and updates, cloned the drives and then activated on respective laptop.