How to share media files from windows 7 pc to android phone over Wireless Router

WiFi File Transfer
WiFi File Transfer turns your Android device into a local file server on your wireless network. After enabling WiFi File Transfer on your phone, you can connect to your phone via a web browser on any computer that is on the same WiFi network. Once connected, you can browse through the files stored on your phone and upload new files to the phone. You can set an optional password in the app on your phone to prevent unauthorized computers from connecting to your device. At the time of writing, WiFi File Transfer is available in a free version with a 4-megabyte limit on files uploaded to your phone over the network, and a $1.40 version with no limits on file sizes.

Wireless File Transfer Pro
Like WiFi File Transfer, Wireless File Transfer Pro allows you to connect to your phone via a local computer's web browser. Wireless File Transfer Pro also includes a local file manager that allows you to browse and edit the files stored on your phone from within the app. Wireless File Transfer Pro supports wireless application installation so you can download an ".apk" file to your computer and install it to your phone over a WiFi network. At the time of writing, Wireless File Transfer Pro is available for free on the Android Market.

File Expert
File Expert is a file browsing application with powerful WiFi capabilities. File Expert allows local computers to connect to your phone via their web browsers, but it also allows your phone to connect to shared resources on local computers. Additionally, File Expert can transfer files between two phones over a WiFi connection, even if there is no established WiFi network present. The only condition is that both phones must have File Expert installed. At the time of writing, File Expert is available for free on the Android Market.

Android Sync Manager
Android Sync Manager WiFi takes a different approach to file transfers. It is a two-part system, with one program installed on your Android device and another installed on your computer. When the devices are connected to the same WiFi network at scheduled intervals, the software automatically synchronizes files, contacts, messages and other information between your computer and your device. Android Sync Manager is available from the Android Market for free at the time of writing.

When you say "share" do you mean copy or view? The choices @jbrown156 listed would be copy options. If you just want to stream media for viewing that is a different set of software.

Do you want to be able to do this only while at home or to be able to access the media over the internet? Again, very different problems....

There are a number of tutorials for streaming using ES File explorer -- Google "windows 7 stream to android ES File" -- Were you unsuccessful following the tutorials?

Are you using a software firewall? If so, temporarily disable it and see if that makes a difference.