do i have a virus? pages not loading

Power off the router. Unplug it from the wall. Wait for few minuets.

Power off the router. Wait a while.

Connect the router back to to the wall.

Power the router back on. Wait until all lights are lit properly.It will take a while.

Restart the computer.

Start up in Safe Mode.

http://support.apple.com/kb/HT1455

Mac at this time don't get viruses. But that doesn't mean something else hasn't wormed it way onto your Mac like some Malware.

Or for the simple fact Mac OS X is not immune to glitches and hickups.

Sounds more like a internet connection problem and or WiFi problem. Connect your Mac to your internet router with a Ethernet cable and see if the same things happen. If they don't then it is a WiFi problem. If it does then it is more than likely an Internet connection problem and you should contact your ISP.

It's very unlikely that this is a malware issue, though if you downloaded and installed anything from a site providing illegal access to commercial movies, that possibility cannot be ruled out. You should download and run a scan with Sophos due to this risky behavior, though I think it would have nothing to do with solving your internet problems. If you don't want to keep anti-virus software installed (see my Mac Malware Guide for help making that decision), you can easily uninstall it after the scan.

As for the internet difficulties, what kind of wireless router are you using? Not all routers are created equal, and some can work fine with Windows machines but will be problems from Macs, due to not properly obeying wireless standards. If this is the source of the problem, you'll probably have to buy a new wireless router, though it's also possible that someone with a good knowledge of wireless networking could change the settings on your current router and fix the issue.

There could also be something wrong with your Mac that is causing the network to fail. Does this ever happen with other networks, or only with this particular one?

well, other members of my family using the same network have never had the same problem as me, so it shouldn't be a network problem.

That is not necessarily the case, especially if they are all using Windows and you are the only one using a Mac. There are definitely routers out there that may work very well with certain hardware and/or systems and not really at all with others. However, if you're all using similar systems, that becomes a less likely possibility.

You didn't answer the question of whether your Mac has trouble with other networks as well...?