How many Security Software's should I use?

I have the following Security Softwares on my computer? Not sure what to get rid of and what to keep? Some do the samething and are probably overkill? Please tell me what I should do?

What I have installed-

1) Pareto Logic Anti-Spyware (Paid Version)

2) Ad Aware Personal SE (Free)

3) Spyware Doctor (Paid Version)

4) Spybot Search %26 Destroy (Free)

5) Spy Blaster (Free)

6) AVG Anti Spyware

7) XoftSpy (Paid Version)

Other Programs-

1) ID Blaster Plus

2) Wintasks

3) File Checker

4) ID Blaster Plus

5) Speed up My PC (Paid Version)

6) Regcure

How many Security Software's should I use?network security

WARNING! Use only one antivirus program. They conflict with each other.

How many Security Software's should I use?norton internet security

I suspect many of those spyware softwares are not what you think they are. Spybot and adaware is probably all you need for spyware removal, you need antivirus software and you need a firewall, this will cover you from the 3 most important perspectives of intrusion and malicious attacks.

As for auto registry cleaners and magic "make my computer faster" software, they are bad ideas all together.