Step1: Click on the Start button.
Step2: Right-click on "My Computer" and the select "Properties."
Step3: In Properties Window, Click on the "Hardware" tab.
Step4: Click on the Device Manager button (Windows XP) and check the installed hardware until you see Network Adapters. Make sure that you are logged on with admin privileges to access Device Manager.
For Windows 7 or Vista, click the Start button and type ‘devmgmt.msc’ in the Start Search box. Hit the Enter key. If prompted, enter your admin password and click Continue.
Step5: Click the "+" symbol next to Network Adapters to expand the section.
Step6: Find a hardware device that is named as "wireless" or "802.11" (for example, Broadcom 802.11g Network Adapter). If you see such a device listed under Network Adapters, it means your computer is wireless-enabled. If you don't see a similar device name, your computer may not have wireless capabilities.
Note: If your computer doesn't have built in wireless capabilities, you will need to install a wireless adapter.
Password protection in wireless network is also very important part.You can protect your wireless network using password.Follow this blog-How to Password Protect a Wireless Network?
If you find any difficulties to perform the above task, consult an expert to solve your wireless network problem ,you can reach online technical support service desk of V tech-squad at their Toll Free No +1-877-452-9201.