XP - Sharing Wireless Connection

[JimboJangles]

I needed to give a PC in my house temporary access to some online files, so I set my laptop's wireless connection to allow other computers to connect to the internet through me and used and connected them through the ethernet ports. Now the icon for my Wireless Network Connection has that little hand under it because it's shared.
How can I return my wireless connection to normal (and not share it anymore)? The option I originally changed under the wireless connection properties is gone for some reason...

 

[cRABu]

right click on my network places on desktop, click properties
2. right click on your wireless conection, click properties
3.click advanced tab and deselect the checkbox under internet connection sharing.

 

[JimboJangles]

Well, before I read what you said, the only thing under the advanced tab was windows firewall. I had checked several times. The Internet Connection Sharing section was blank (missing), and there was no way to uncheck it...
But now I'm on my home network again, which is where I turned it on in the first place, and it's there again. So apparently i can only change it when I'm on the network where I changed the settings in the first place.
Thanks for the help!