how to set up alexa app on windows 7

Well you can but I've forgotten how I did it. It wasn't complicated though. This is in answer how do you set up Alexa on WIN 7.

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.

Microsoft doesn't own Alexa. Amazon Does. Microsoft owns Cortana.

In January 2018, when this question was originally asked, there was no "Alexa app" for any Windows computer.  At that time, the only "Alexa apps" available were for iOS (iPhones/iPads) or Android devices. 

You could configure an Amazon Echo device ("Alexa" is the "wake word" for these devices and thus the devices are often colloquially referred to as "Alexa") using the appropriate app installed on your smart phone or tablet.

If you wanted to configure an Echo device using a Windows computer, you had to go to https://alexa.amazon.com AND your computer had to have wi-fi capability (true of virtually all laptops, but not true for many desktop/tower computers).

In early November 2018, Amazon released an "Alexa app" for Windows 10 (https://www.theverge.com/2018/11/8/18075450/amazon-alexa-windows-10-app-download-features).  If you have a computer with Windows 10, you can download this app from the Microsoft Store (http://tinyurl.com/yxk5hhqs). 

In addition, there are now Windows 10 computers that come with an Alexa app built in.  See https://www.amazon.com/b?node=17549366011

If you install the Alexa app on a Windows 10 computer, or have a Windows 10 computer with Alexa built in, you can use your computer itself to access many of the features available on Echo devices without buying one of these devices.  See the FAQs here:  https://www.amazon.com/b?node=17549366011

However, the Alexa app for Windows 10 does NOT have the capability to configure a separate Echo device.  According to this Amazon help article (Using Alexa on your Windows 10 device):

Note: To register and setup new Echo devices, you must visit https://alexa.amazon.com/spa/index.html#settings or use the Alexa app for iOS or Android.

If you want to configure an Amazon Echo device,  Amazon's directions for 2nd generation Echo devices are here:  https://www.amazon.com/gp/help/customer/display.html/ref=hp_left_v4_sib?ie=UTF8&nodeId=202189140  You have two options:

1. use the Alexa app on your Apple or Android smart phone or tablet
2. use a browser on your wi-fi capable computer to go to https://alexa.amazon.com.  Note, however, that using alexa.amazon.com may not support all Echo devices:

Step 3 of Amazon's directions (connect your Echo device to your wi-fi network) are more fully explained here:  https://www.amazon.com/gp/help/customer/display.html?nodeId=202179270 

If you're using the web site, click "Settings" then "Setup a new device" and then select the type of Echo device you have.

What part of the previous response did you not understand?

Thank you.