The default IP address of Windows 7 (and Windows Server 2008 R2) virtual Wi-Fi Access Point (AP) feature called Wireless Hosted Network is 192.168.137.1. Although, this address is highly unlikely to conflict with other addresses that you may have configured on your network still, you may wish to change it to another value. In order to be able to change this default IP address you need to modify a Registry setting as follows:
To start the registry editor, type regedit in the Start menu search text box and press enter. Go to HKLM\SYSTEM\CurrentControlSet\services\SharedAccess\Parameters and change the IP address in ScopeAddress, ScopeAddressBackup and StandaloneDHCPAddress strings.
REG_SZ Value name: ScopeAddress
REG_SZ Value name: ScopeAddressBackup
REG_SZ Value name: StandaloneDHCPAddress
A word of caution – incorrectly editing the registry may severely damage your system. The above modifications are intended for Windows advanced users who are familiar with the registry editor. Users are also reminded to backup the registry before making any critical changes.