You can look through here, and we can go over this later. There are some portable antiviruses you can use too that are not listed here. I'm still digging for those..
This is most everything I use for security (all free)..
Avira Free Antivirus
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This seems to be the best free antivirus now.
http://www.tomsguide.com/us/avira-free-antivirus,review-2207.html
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Drive-By Downloads: How They Attack and How to Defend Yourself
http://www.tomsguide.com/us/driveby-download,news-18329.html
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Malwarebytes Anti-Malware (MBAM)
https://forums.malwarebytes.org/index.php?/forum/40-malwarebytes-anti-malware-support/
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Malwarebytes Anti-Exploit
https://www.malwarebytes.org/antiexploit/
https://forums.malwarebytes.org/index.php?/forum/125-malwarebytes-anti-exploit-support/
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BleachBit
Cleans up junk that other apps leave behind.
http://bleachbit.sourceforge.net/
CCleaner Removes temp files, cleans the registry and the like. Also great for uninstalling apps.
https://www.piriform.com/ccleaner
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CryptoPrevent
This helps stop ransomware. Use maximum mode and understand how it works!
https://www.foolishit.com/vb6-projects/cryptoprevent/
http://en.wikipedia.org/wiki/Ransomware
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Unlocker
Unlock programs that get stuck in an unknown process.
http://filehippo.com/download_unlocker
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TDSSKiller
This helps remove malware that may otherwise go undetected.
http://usa.kaspersky.com/downloads/TDSSKiller
https://www.youtube.com/watch?v=_UduBJRhYd0
Hiren's BootCD
http://en.wikipedia.org/wiki/Hiren%27s_BootCD
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Malwarebytes Anti-Rootkit BETA
https://www.malwarebytes.org/antirootkit/
https://forums.malwarebytes.org/index.php?/forum/116-malwarebytes-anti-rootkit-beta-help/
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FileASSASSIN
https://www.malwarebytes.org/fileassassin/
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RKill
http://www.bleepingcomputer.com/download/rkill/
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AdwCleaner
http://www.bleepingcomputer.com/download/adwcleaner/
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ComboFix
http://www.bleepingcomputer.com/download/combofix/
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RogueKiller
http://www.bleepingcomputer.com/download/roguekiller/
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NetAdapter Repair
http://www.bleepingcomputer.com/download/netadapter-repair-all-in-one/
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Junkware Removal Tool
http://www.bleepingcomputer.com/download/junkware-removal-tool/
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Farbar Recovery Scan Tool
http://www.bleepingcomputer.com/download/farbar-recovery-scan-tool/
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For more help, check out:
Threatpost
Krebs on Security
http://krebsonsecurity.com/category/latest-warnings/
Bleeping Computer