Antivirus XP 2008 is not an antivirus application, but a cleverly tries to get you to buy the non-existent "security" it's selling. Advertised using the common tricks of Trojans and faux security alerts, this nasty piece of malware can take over your desktop settings to mimic safe mode, display fake virus detections and opens Internet Explorer and start showing that it has detected some virus. That is totally a scam.

I found many articles including an elaborate article “How To Remove Antivirus 2008” on exbii forum and also in CNET forum. I am retyping it for my blog reader below with more details in case you're not able to get to the forums.

First you need to stop the program from loading on startup. This is what you do to stop it:

Start Menu> Run
Type msconfig

Go to Startup tab

Uncheck lphc35dj0e1an
Uncheck rhc75dj0e1an

Click apply, then ok
Restart computer

Step: 2

Then you need to delete the main files this program uses. Delete the following file:

C:\windows\system32\lphc35dj0e1an.exe

Then delete the following folder and all files in it:

C:\program files\rhc75dj0e1an

This should remove the program from your system but you probably still have a warning message displayed as your wallpaper in Windows and the virus removed the ability to change the wallpaper or your desktop settings.

To restore ability to change your desktop settings and select a different wallpaper and screen saver do the following:

Start Menu > run

Type gpedit.msc

Navigate to User configuration, Administrative Templates, Control Panel, Display

Right click on Remove Display in Control Panel
Click on Properties and select Disabled

Do the same steps to change the following attributes to disabled:

Hide Desktop Tab
Prevent changing wallpaper
Hide Apperance and Themes tab
Hide Settings tab
Hide Screen Saver tab

You should now be able to use your computer normally and change the wallpaper to something other than the warning message Antivirus XP 2008 set it to.

Read more:
http://www.xp-vista.com/
http://www.symantec.com
CNET FORUM