windows antivirus has installed itself, how can I get rid of it?

you can remove it with Malwarebytes Anti-Malware

please get it from www.download.com or from its own web site www.malwarebytes.org

I am assuming this is the one you mean as there are

many variations....but this should remove all of them.

Windows Antivirus 2008 is a rogue program and will scan your computer and display a list of security risks on your computer that cannot be removed unless you first purchase the software. These risks, though, are false positives or fake and are being displayed to scare you into thinking you are infected.

Scroll to this for Free removal avoiding all ads above it.

Automated Removal Instructions for Windows Antivirus 2008 using Malwarebytes' Anti-Malware:

Please update before scanning and close all other

open applications.....this is a trusted program.

This is malware and will not be removed by A/Virus.

a lot of people on here swear by superantispyware, so download that, update, and run an in depth scan in safe mode, XP Antivirus 2008 is extremely hard to get rid of, google it and find instructions on how to remove in manually but unless you know what your doing you might run the risk of destroying your computer, if all else fails just reformat its the safest and easiest way out., Good luck.

Try Kaspersky Antivirus. Its the best. or remove the application from the registry.

the problem your telling us is a virulent disease it particularly is meant to spamm you to death with concepts off new Anti Virus application, both to develop into invaluable or the Anti Virus is contaminated with a a lot more advantageous volatile application receive those application Malwarebytes loose Superantispyware loose Microsoft take care of practices needs & Avast (they're meant to run actual togheter) Spybot search for&damage

Hi, you should try some anti-antivirus lol! Check in google search if there is any software to delete that antiviral software.

type it in the search for questions .here on yahoo answers.there's a removal tool for it.if not i had to run recovery.

simply download malware bytes anti-malware (free) then update it and make a full scan

http://www.download.com/Malwarebytes-Anti-Malware/...

and then you have to get some solid protection,download these free programs (completely free)

uninstall any security program you are using and install these free programs

1-Anti-virus

a-avira personal classic edition(free)(detection rate 99.6%)

http://www.download.com/Avira-AntiVir-Personal-Fre...

2-Anti-spyware

a-super antispyware free(one of the most recommended antispywares)

http://www.download.com/SUPERAntiSpyware-Free-Edit...

b- a-squared free(will get rid of all kinds of spyware,backdoors.trojans,keyloggers and etc)

http://www.download.com/A-squared-Free/3000-2239_4...

3-firewall

a-comodo firewall pro(free)(the only free firewall to pass matousec leaktest with an excellent score 95%

http://www.download.com/Comodo-Firewall-Pro/3000-1...

4-browser

a-firefox 3.0(safest browser,fastest browser and most enjoyable browser)

http://www.download.com/mozilla-firefox/?tag=lst-3...

5-browser add-ons(firefox)

a-mcafee site advisor(warns you of bad sites)

http://www.download.com/McAfee-SiteAdvisor-for-Fir...

6-pc utilties

a-ccleaner:(cleans temporary internet files,history cookies , fixes the registry and etc)

http://www.download.com/CCleaner/3000-2144_4-10315...

b-revouninstaller: (uninstall the programs and removes the traces left in registry )(completely remove sticky programs like norton because it scans the registry for traces left in the registry after uninstalling the programs

http://www.download.com/Revo-Uninstaller/3000-2096...

http://www.download.com/Malwarebytes-Anti-Malware/...