Ok, I just googled this to see what my options for changing my IP address were, because I can't live without internet for a day, so no option to reset it :O So NO, this is not my work, I don't take ANY credit for it.
I haven't tried these, but try them yourself, it may work.
Windows - Computer connected directly to the modem
1. Get to a command prompt. (START, run, cmd).
2. Type "ipconfig /release" (without the quotes, on the command line by itself).
3. Type "ipconfig /renew" (without the quotes, on the command line by itself).
Windows (second option) - Computer connected directly to the modem
1. Get to a command prompt. (START, run, cmd).
2. Type "ipconfig /release" (without the quotes).
3. Shut down computer.
4. Turn off all ethernet hubs/switches.
5. Turn off cable/DSL modem.
6. Leave off overnight.
7. Turn everything back on
Network with Router
1. Log into the router's admin console. (Often http://192.168.1.1/)
2. Release the IP address. (Method varies by router manufacturer)
3. Turn off router, ethernet hubs/switches, and the cable/DSL modem.
4. Leave off overnight.
5. Turn everything back on.