First off, you cannot assign IP addresses to the computer. Change it back to have it assigned and your Internet connection will repost. You will have to unplug/restart your Internet Modem (cable/dsl).

If you followed my advice and it still occurs, your problem is not related to your setup.

You probably installed a new network card in the computer you are having problems with recently. If the computer is a little older, you may be having several issues that I have experienced in the past.

It is possible that your CPU fan is not operating and may need to be replaced. Your problem is usually associated with an overheating processor.

Also, the additional network card requires more power. I found that in older systems with lower watt power supplies had similar problems after upgrades supplying power to the processor. Look at the power supply fan and make sure that it is turning and not making noise. Even if the power supply works but there is no fan, it needs to be replaced before it does damage to your system. You may consider a 300 watt power supply (or greater) for a replacement. Make sure someone helps you out with selection of the power supply and install. They usually range from $25 on the Internet to $50 at the electronics store of your choice.

Hope this helps. Feel free to post back if it does not for other solutions.

:
: Are you doing Internet Connection sharing or are you directly connecting both computers to the Internet via a Switch or Hub? This could make a great difference with Windows 98. Windows 98 is not the best at Internet Connection Sharing (software must be installed for it to support it). Also, are you using USB devices to accomplish this? Do you have a firewall installed on both PC's? You should do this as well as add Antivirus software. DSL is dangerous as most ISP's will keep a static IP address on your line and hackers love those!!!

: Start with those questions and please post back. This will give me an idea where to go with my advice for you.

: In the mean time, disconnect your sister's computer from the DSL (remove Ethernet cable) and reboot. Work with the computer for some time to see if the problem still occurs. If so, I would suspect a hardware failure or system file corruption.

: Hope this gets you in the right direction.

Start with those questions and please post back. This will give me an idea where to go with my advice for you.

In the mean time, disconnect your sister's computer from the DSL (remove Ethernet cable) and reboot. Work with the computer for some time to see if the problem still occurs. If so, I would suspect a hardware failure or system file corruption.