Malware protection questions

I'm using dial up and that's slow enough to begin with, but the malware/addware
or whatever it's really called slows things to the extreme. I've got Spybot and
run that now and then, but it doesn't seem to matter because those programs get
back in pretty quickly and some of them it seems as soon as I log on. Is there a
way to keep them out altogether that won't slow the computer way down? I've
gotten the impression that some defense programs slow things down more than the
viruses do...

 

first off spybot is only spyware, you need one antivirus running in real time before you should even connect to the internet,

I will give you a link to Bleeping computers and you can go there to see if the infections can be removed from your pc.

if the infections are entrenched it might just be better to do a clean reinstall.

Malware removal sites courtesy of LemP
Or -- and I think this is what you really should do because your problem is likely to be buried pretty deeply -- seek guided malware removal help from one of the specialty forums:
• Bleeping Computer: Am I infected? What do I do?
http://www.bleepingcomputer.com/forums/forum103.html
• MalwareBytes' Anti-Malware
http://forums.malwarebytes.org/index.php?showforum=41
• SpywareHammer: Malware Removal
http://spywarehammer.com/simplemachinesforum/index.php?board=10.0
• Spyware Warrior: Help with spyware removal
http://www.spywarewarrior.com/viewforum.php?f=5
• DSL Reports: Security Cleanup
http://www.dslreports.com/forum/cleanup
• Bluetack: Malware Removal
http://www.bluetack.co.uk/forums/index.php?showforum=172
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http://www.microsoft.com/en-us/download/details.aspx?id=5201
MSE Download
http://experts.windows.com/w/experts_wiki/89.aspx
MSE installation checklist

if you install MSE, then read checklist thoroughly.