Cannot Unshare a Folder in Windows XP

I wanted to unshare a folder while using a hotel wireless network but after right clicking on the shared folder (the folder with a hand icon underneath it) and choosing Sharing and Security..., the box for sharing was checked but grayed out, so that it could not be unshared.

To correct this, reboot and press F8 to enter the menu to choose a boot up type. Choose Safe Mode with Networking. After Windows XP boots up in Safe Mode, go to your shared folder and right click it, choose Sharing and Security... and a whole new sharing menu appears that allows you to unshare the folder. Reboot back into normal Windows XP. Annoying Windows bullshit...