Turn windows 7 to wifi hotspot

SOURCE: I forgot where I read this

Getting started with wireless Hosted Networks

In order to use the wireless Hosted Network feature, your wireless adapter must be using drivers certified for Windows 7. If Windows detects a supported adapter, it will automatically add a connection to the Network Connections window, named Microsoft Virtual WiFi Miniport Adapter, such as Figure 1 shows. If multiple supported-adapters exist, Windows will automatically choose the one to use for the wireless Hosted Network.

Figure 1.

Microsoft requires all wireless Hosted Networks to use WPA2-PSK (AES) encryption. However, there is not a mechanism put in place to prevent file sharing. Hosts and clients should manually protect shares if not all users can be trusted.

In addition, keep in mind that wireless Hosted Networks do not automatically restart after the computer resumes from sleep, hibernate, or restarts. However, if used, a third-party utility might initiate a reconnection. If you manually start the wireless Hosted Network again, Windows will use the previously entered network details though.

Manually create a virtual AP with netsh

If you want to experiment with the wireless Hosted Network feature with text commands, click the Start button, enter “cmd” and hit Enter. Once the Command Prompt window appears, you can enter the following to set the network details:

netsh wlan set hostednetwork mode=allow ssid=YourVirtualNetworkName  key=YourNetworkPassword

Of course, replace the SSID and key placeholders with your desired network name and WPA2-PSK encryption key.

Before you enable the Hosted Network, you can configure the real network adapter to share its Internet access using the Internet Connection Sharing (ICS) feature of Windows. This way people connecting to the virtual AP will receive Internet access. You can leave the Command Prompt open so you can start the Hosted Network later.

To enable ICS, navigate through the Control Panel or Network and Sharing Center to bring up the Network Connections window. Then right-click the network adapter that’s connected to the Internet and select Properties. Then select the Sharing tab, check the Allow other network users to connect through this computer’s Internet connection, choose the Hosted Network Connection from the drop-down listbox, and click OK. See Figure 2 for an example.

Figure 2.

Now return to the Command Prompt and enter the following to enable the Hosted Network:

netsh wlan start hostednetwork

To manually turn the Hosted Network off, enter the following:

netsh wlan stop hostednetwork

To see the Hosted Network details (see Figure 3), including the MAC addresses of connected users, enter the following:

netsh wlan show hostednetwork

To change the WPA2-PSK key, you can enter the following:

netsh wlan refresh hostednetwork YourNewNetworkPassword

Figure 3. Click to enlarge.

It’s a virtual AP

Now others nearby should see the Hosted Network appear in their list of available wireless networks. They can connect like normal and enter the encryption key when prompted.

Remember, you’ll have to manually start the Hosted Network again, if desired, after rebooting the computer. Most importantly, remember sharing isn’t blocked; make sure you only invite people you trust.