Wow, I find myself typing the Topic title like a total troll.
Sory, didn't know on wich section to post this.
So, on my parents their laptop, my sister is always oding stuff on it too and now, this morning, XP Guardian pops up, it never said anything and says that the system is being hijacked and that third parties are scanning the laptop for info. I'm a total noob at this, do I need to start panic, or can I count on my Temper Tech's?

 

err pull the plug on the lappy, disconnect it from the web and wtf is xp gardian?

 

Hope you don't have trouble removing it...

 

since it's a trojan, maybe malwarebytes might help? or perhaps spybot- search and destroy?

 

CCleaner doesn't clean any type of Malware, be it spy-ware, Trojans or virus'.

 

Yeah true. Well, I'm going to try Spybot: Search and Destroy first and then your method, Velveteer.

EDIT: I can't getto other sites except my homepage.. What now ..

 

I've had a few problems with fake anti-virus programs and usually I have to end up removing them myself since anti-virus always seems to pass over them. This has worked for me at least, it may not work for everyone.

0. Before doing any of this, I suggest using all your legit anti-virus programs. If none of them can do anything, you can do this or try an alternative one that the other posters listed
1. Cut off all internet connections. Not sure if this does anything really, but it's a paranoia thing. Helps me feel secure at least.
2. Go to Task Manager, and find out the name of the executable. For example, FireFox is firefox.exe.
3. If possible, right click the pop up of the fake anti-virus and go to properties. It should show you the folder where it's rooted. Find that folder and delete it.
4. End the process in Task Manager. This will stop fake pop ups and the like. Remember, stop the PROCESS, not the APPLICATION. It can just pop up again if you stop the application.
5. Go to Start->Search and type in the name of the program (like firefox or something). I'm guessing you'd search for xpguardian or something. Delete everything that the search finds that's related to your fake anti-virus. Odds are it'll be rooted in a folder similar to the one deleted previous, if you could do that. Otherwise, most of them should be rooted in one folder.
6. After you're done, no more pop ups should be appearing. Run anti-virus scanners just in case.

Not sure if this is a load of bullshit, but it has worked for me in the past. The last one I had was pretty annoying. It was blocking my executables and popping up porno websites. Not fun.

 

Follow this guide:
http://www.spywarevoid.com/remove-xp-guard...#manual_removal

 

From what i've read its a pretty nasty piece of software. I'd instruct your family to be very careful what they install, OP.