|I'd say try download SUPERAntiSpyware free edition and scan with that. If that doesn't help try booting in safe mode (press f8 as you boot your computer and select safe mode WITHOUT networking) and do a full scan with norton.|
Sometimes malware changes settings so I'd also go into your network settings through control panel and make sure you don't have a static ip set by right clicking the adapter, going to properties. double click TCP/IP adapter and looking there.
Radeon HD X2600
2gb Ballistix 4-4-4-12 DDR2