Cleaning up the leftovers from the previous installation
You will notice that Windows 10 is without any trace of your previous installation of Windows, which is stored in the Windows.old folder.
We now remove once and for all this last vestige of the previous installation. To do so, run the disk cleanup utility as administrator.
Just a warning before proceeding: deleting these files will be impossible to go back to the previous version that was installed, but in any case I don’t think you would want to do this same …:)
Select the corresponding options, and then click OK. OK, the previous installation was removed and a good disk space was recovered. The same procedure windows 10 activation key can also be done from utilities such as CCleaner.
Getting the activation key of Windows 10
Most likely you noticed that it was not required to sign in with a Windows activation key 10, however there are ways to see which key is currently applied to Windows with the help of third-party software. A quick Web search shows dozens of programs and options used in this example the freeware Keyfinder. Install the program and run it, the activation key will be displayed in the field CD Key. Save it for future needs.
Reinstalling Windows 10
If you need to reinstall Windows 10 there are some options. The most practical without a shadow of a doubt is through the reset utility operating system present in Windows itself, which creates a new clean install of semi-automated way operating system. Check out the post about how to use this feature.
However if you prefer to reinstall Windows in the traditional way through the installation media, you can also. Boot the PC by the media and whenever required the activation key click jump.
… and Do it later.
The installation process itself is identical to that of any other modern version of Windows. Upon its completion the operating system should identify what has been accomplished in this equipment get windows 10 activation and automatically reactivate. Detail: may take some time for this to happen. If this does not occur, no way even after you have been waiting for several days, you can try to force the activation by providing the key generated after the first installation, which in this instance was obtained with the Keyfinder software.
To do so, open the system settings applet and then the item to update. Select the activation option and click the button to change the genuine windows 10 pro product key. Provide the key, Windows will activate.
Just out of spite: installing for the first time directly from the installation media
Even with the guidance from Microsoft that the first installation of Windows Update version 10 should be made from a previous version of the system, I decided to simulate what it would be like to install it from scratch without a previous version. The biggest problem in this case is that without a prior installation Windows 10 does not generate an activation key and get in the way of evaluation (trial), as can be seen by running the command slmgr/dlv (at the command prompt as an administrator), in the License Status.
However another line caught my attention, the Remaining rearm count SKU. I remembered when Windows 7 was installed in evaluation mode for 30 days, and that the command slmgr-rearm it allowed to restore the time of evaluation, and that in the case of Windows 7 could be run up to three times. So I decided to test whether Windows 10 also offers this possibility: I advanced the date of the equipment in a few days and ran the above command, which ran successfully:
Rebooted the system and ran the slmgr/dlv: the counter was decremented for 1000 and Windows continued windows 10 serial keys operating normally, within the evaluation mode:
Really it’s hard to say whether it will be possible to use the Windows 10 home product key in ad eternum evaluation mode, but at least this release build there is strong evidence that Yes. But it is something that Microsoft can easily solve with a simple update system, so you can’t tell blindly with this possibility.