[Windows 10] 升級windows 10後退回windows 8.1 日後還可以再升級windows 10嗎?

我升級windows 10後,有某些程式用唔到,所以退回windows 8.1。係一年之內仲可唔可以升級至windows 10呢?
因為我見到windows update 已經無左windows 10既更新,按check for update都無,姐係無得再升級至windows 10??

求各位師兄解答

我升級windows 10後,有某些程式用唔到,所以退回windows 8.1。係一年之內仲可唔可以升級至windows 10呢?
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hkmaplenet 發表於 1/8/2015 20:18

好似 upgrade 完有條 key! 抄底可以再裝!

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但我upgrade 完無KEY比我...

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本帖最後由 toylet 於 2015-8-1 21:41 編輯
但我upgrade 完無KEY比我...
hkmaplenet 發表於 1/8/2015 21:28

幫大大 Google! 應該可以用其它工具!

Step 4 - Get your new licence key

If your computer has not been activated, then you can force it to do so. Get up a command prompt from the Start Menu and type, slmgr.vbs /ato. This will force your computer to activate its new license with Microsoft. If the process fails, give it a few tries. At this point, you're ready to perform a clean installation of Windows 10, although you may want to grab the new Windows 10 license key using Belarc Advisor - in the current version of Belarc (8.4), it is listed under 'Windows 8.1'.

The key that you get from Belarc is a generic installation key. You can use this when the Windows installation asks you for your license key, which saves the installation process from repeatedly bothering you about entering it. The reason that you get a generic key from the Registry is because of the way Windows 10 handles activation. Effectively, it takes a digital fingerprint of your computer and sends that and your existing licence to Microsoft. When you perform a clean install, the same fingerprint is sent to Microsoft and it checks to see if your computer has been activated for Windows 10; if it has, your computer is activated. This means that the licence key you get from the Registry is not as important as it used to be.

Source: http://www.expertreviews.co.uk/s ... our-new-licence-key
   

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