Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Re-install over OEM activation?

26 Mar 2010   #1

Windows 7 Home Premium
Re-install over OEM activation?

I recently needed to completely reinstall Windows 7, but my laptop came with it pre-installed meaning that I didn't have a Windows 7 disc. So I just downloaded the ISO onto a disc, making sure it was the same version as the OEM (home premium 64-bit). It has installed fine, but when I try to activate it using the product key from the label on the bottom of my laptop it says the key is invalid. If I phoned Microsoft would they allow me to use that key? Also, have I done anything illegal by downloading the Windows 7 ISO and burning it to a disc? I mean, I technically already bought Windows 7 when it came with my computer, so is there any problem with having used a downloaded ISO from the net? It's not like I'm hacking or bypassing or anything - the last thing I want is a pirated version of Windows!

My System SpecsSystem Spec
26 Mar 2010   #2

Windows 7

It's different bits. You probably need to contact your laptop manufacturer to get a "recovery disk" if they didn't give you one when you bought it.
My System SpecsSystem Spec
26 Mar 2010   #3


Make sure you have a clean copy of the ISO by doing a hash check against the office Hash: Windows 7 RTM SHA-1 hash / checksums

If it matches, then the ISO should be good to reinstall your factory OEM and activate it.

Often when activating factory OEM the Product Key given is a batch key which requires a robocall to MS.

You can also try calling your manufacturer tech support to see if they will help you activate. Many will no longer support clean reinstalls as the bloatware they add provides most of their profit margin. But you can first ask them hypothetically if you can clean reinstall with a clean copy of the ISO provided by MS. Sometimes they will help with this to get it activated. If not, call back and try another approach: tell them your factory install has lost activation and isn't reactivating. At worst, they will send you Recovery disks.
My System SpecsSystem Spec


 Re-install over OEM activation?

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
Clean Install : Factory COA Activation Key
How to Clean Install Windows 7 without the Factory Added Bloatware Most all factory built PCs today come with many programs and applications added by the PC manufacturer that have little or no use in everyday life, they tend to take up space and in some instances cause performance issues and...
Activation after fresh install
My father has a Toshiba NB200 notebook running Windows XP (which is no longer supported) and after having malware problems he asked me if I could upgrade it to Windows 7 for him. As it has no optical drive I downloaded a Microsoft iso file and created a bootable USB drive. I have successfully...
Windows Updates & Activation
Activation key out of uses, need to do fresh install of Windows
I built my gaming PC about a year or two ago, since then it's been my main computer, not just a gaming PC, and has gotten filled with useless junk I no longer need. The GPU has also started to crash quite a bit recently (ever since I installed the new driver). So I plan to do a fresh install,...
Windows Updates & Activation
Removing one OS after double install activation?
Ok, so i double installed windows 7 to activate it and naturally it boots both at start up. I can disable one of them from booting in "msconfig" which seems like it would free up RAM but my question is will this mess something up? Will my pc start up normally or will this cause a mess?
Installation & Setup
Repair Install activation same as original?
I just did a repair install due to a virus situation. The install went fine, of course, but it requires re-activating. I made a backup of my original install after activation. My questions is, if I activate the repair install, will that change the records with Microsoft in such a way as to...
Windows Updates & Activation

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 11:33.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App