scan and password protect your PC from the kids

SCAN YOUR SYSTEM
You may have other stuff on the hard drive based on the kid's Internet travels. I suggest you try Ad-aware and Spybot Search and Destroy. They're tough on spyware and any programs from these sites that could be on your system. You can download both free programs at:
http://www.komando.com/bestshareware.asp

PASSWORD PROTECT YOUR PC
If I were you, I would also protect the computer with a password.

In Windows XP, click Start>Control Panel. Double-click User Accounts. Click Change an Account. Click your account. Click Create a Password. Enter the password twice, along with a hint, if you wish, and click Create Password.

In Windows 2000, click Start>Settings>Control Panel. Double-click Users and Passwords. On the Users tab, check the box next to "Users must enter a username and password to use this computer." Click Administrator (assuming that is you) and click Set Password. Enter the password twice and click OK. Next, go to the Advanced tab. Check the box next to "Require users to press Ctrl-Alt-Delete before logging on." Click Apply>OK.

Earlier versions of Windows are difficult to protect with passwords. However, you can block access to the Internet if you use Internet Explorer. Click Tools>Internet Options. Select the Content tab. Click Enable. Enter your password and a hint, if you like. Click OK>OK.

People who try to surf will be asked for the password. You can disable the password requirement by clicking Tools>Internet Options and selecting the Content tab. Click Disable and enter your password.