jetman,<br /><br />Use your existing program, but set up a new user on your PC for your sister, and give that user only user (not administration). This way the user can not change any system settings and anything advanced is locked out.<br /><br />If you run a network, I would advise setting the user to a power user. This gives them access to remote PCs, but again within user constraints.<br /><br />Apart from that, if your running a NAT and sharing your WAN to your LAN, I use Sygate Office Networking (you can use Sygate Home - Office just has VPN and tunnelling which I use).<br /><br />On my LAN I have 6 PCs and my PC has unlimited WAN access (no capping). The other PCs I can throttle up and down any capping limits, block specific sites, etc). Also if others are using the LAN and I log on, I get priority on any WAN access.<br /><br />Hope this helps!