I keep getting malware alert messages! and sytem alert messages?

malware alerts and windows security alerts! windows says

Warning! Potential Spyware Operation!

Your computer is making unauthorized copies of your system and internet files. Run full scan to prevent any unauthorized access to your files! Click here to download spyware remover...

and the malware alert says

Warning!

Trojan Adware.W32.ExpDwnldr spyware detected. This Trojan allow attackers to access your computer from remote locations, stealing passwords, Internet banking and personal data. This also prompts advertising popups. This process is a security risk and should be removed form your system

Type: Trojan Horse

System Affected: Windows 98,2000,NT,ME,XP

Security Risk(0-5): 4

Recomendations: Click Yes to get all available antispyware software.

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ALSO!!!!!!!!i keep gettin this red backround for my wallpaper it says YOUR PRIVACY IS IN DANGER!

how would i get rid of that? i dowloaded the superantispyware how do i use it exactly? im only 17 idk anything bout that

I keep getting malware alert messages! and sytem alert messages?malware

Hi,

Most spyware masquerade as anti-spyware! You are obviously infected with spyware and adware. Until you get rid of it DO NOT use your credit card or log into your bank account using your computer. Try this:

1. Download Spybot S%26D from http://www.download.com/3000-8022_4-1040... . Install it,