in this i will explain, (or at least try to explain lol) on what rogue fake anti virus programs and how to remove them. basically what happens is a warning will pop up (the warning will look like it came from your computer instead of the antivirus program) and it will say some thing like this "warning! there is a adware or virus in your computer. start scan and remove them?" when something like that pops up, DONT TOUCH UR MOUSE!! first do ctrl+alt+delete, then click on "start task manager" then go to processes and look for something called "rogue". click on it and end the process. if u click on the warning at all, it will just make things worse. what the warning does is when u click on it, it puts the adware and all the virus's in your registry by itself and leaves your security wiiiiiiide open. the most notorius program is "antivirus xp" this problem happened to me and i had to restart my comp 2 times and my windows defender said i had 20 high or critical virus's all from the program, it even tried to uninstall my windows defender and my macaffe security! even when i did safe mode i had to use system restore to end the problem. now to remove the program, (u only got rid of the warning, now to get rid of the problem completely) follow these instructions
Navigate to Start > Run, type cmd in the box and click Open
In the command window, type regsvr32 /u shlwapi.dll and press Enter
Next type regsvr32 /u wininet.dll and press Enter
Next Press Ctrl + Shift + ESC

Right click on XPAntivirus.exe from the processes window and select the option to end process
Right click on XPAntivirusUpdate.exe from the processes window and select the option to end process
Navigate to Start > Search, then click on Files and Folders. Search for and delete the following files:
XPAntivirus.exe
XPAntivirusUpdate.exe
shlwapi.dll
wininet.dll
XP Antivirus 2008.lnk
Uninstall XP Antivirus 2008.lnk
XP antivirus
XPAntivirus.lnk
Uninstall XPAntivirus.lnk
XPAntivirus on the Web.lnk
XPAntivirus.url
Navigate to Start > Run, type regedit in the box and click Open
Delete XP antivirus in the following path: HKEY_USERS\Software\
Restart your PC and everything should be back to normal

i hope i have helped u with this problem. if u need any help either post here or send a email to me at necroblaze@gmail.com