I have installed Netgear 802.11 g wireless router. I have inbuilt adapters in comp. I get following properties in my wirelss..
Unsecured Wireless netowrk. This network is configured for open acsess. Information sent over this network may be to others....

I tried to change into Data encryption to WEP but the wireless did not work. To make secure and data encrypted, what steps should I follow? (Note: I intalled wirelss routers according to manufacturers instruction.)

Please give your suggestion.

I dont remember the specifics about the Netgear router but it seems that you need to install WEP like you have done but you also need to authorize NIC to access the router. All I can say is read the instructions that came with the router, if you cannot figure it out you can always call the 800 help line they can help you.
Good luck.

See if this helps:

-Go to router's default page (it's 192.168.2.1 on my machine)
-Log in with your password, if you had set up one earlier
-Go to 'Security', and change the security mode to 64bit WEP (I'm assuming you had 128bit WEP before, else do the other way 'round)
-If neither of 'em works, try WPA2 ... makes life easier (If you're running an older version of MAC on any of the machines in the LAN, there's no way out, other than simply letting it flow unsecured; which is the situation I am at.
-Setup a WPA2 passphrase -- Hit 'Apply Changes' .. you should be good to go!!!