how to set up alexa app on windows 7

The Alexa "app" is installed on a smart phone or tablet (e.g., an iPhone or iPad).  Assuming that you have a new Amazon Echo, instructions are here: 

https://www.amazon.com/gp/help/customer/display.html/ref=hp_left_v4_sib?ie=UTF8&nodeId=202189140

If you have a computer with wi-fi capability (most laptops), you can configure Alexa by going to https://alexa.amazon.com/

In either case you'll have to have (or create) an Amazon account.  If you're going to use your own Amazon account, after you have things set up, you probably should go to Settings > Accounts > Voice Purchasing and either disable purchasing or set a "voice code" for authorizing purchases.  Otherwise, your grandkids may put your bank account on a diet.

How do I set up Alexa on windows 10 ?

What part of the previous response did you not understand?

You moderators don't understand the question.  Your answer is for how to set up Alexa on a smart phone or tablet (apple or android).  The question is how to set it up on a Windows 7 PC.  The true answer is you can't.  It's funny that Microsoft has Alexa apps for IOS and Android but not for Windows, it's own product.

You moderators don't understand the question.  Your answer is for how to set up Alexa on a smart phone or tablet (apple or android).  The question is how to set it up on a Windows 7 PC.  The true answer is you can't.  It's funny that Microsoft has Alexa apps for IOS and Android but not for Windows, it's own product.

"You moderators don't understand the question. Your answer is for how to set up Alexa on a smartphone or tablet (apple or android)."

Except for the fact that the first response told you that you had to use a mobile device, or a web browser (limited) to set her up. The only way you could set her up on your PC would be *gasp* a web browser.

"The question is how to set it up on a Windows 7 PC. The true answer is you can't."

As stated above, that is pure BS. You set it up via a web browser if you don't want to do it via mobile.

"It's funny that Microsoft has Alexa apps for IOS and Android but not for Windows, it's own product."

This clearly shows you tech illiterate because anyone under the age of 35 would know that Alexa is created by Amazon, Inc. Microsoft's personal assistant is named "Cortana" which is on iOS, Android and Windows.

So please, before being ignorant to the responses given, read what is posted, and don't assume anything, because the Alexa owned by Microsoft part just made you look ridiculous.