For most AV programs it is required to use a specific uninstaller for a complete removal of the AV program.
I found this list of uninstallers somewhere (I do not even remember where) and thought it would be useful to place it into this tutorial section.

AV Uninstallers

[01] avast! AV > Info > Tool
[02] AVG AV > Info > Tool (32bit) - Tool (64 bit)
[03] AVG Identity Protection > Info > Tool
[04] avira 6 AV > Info > Tool
[05a] BitDefender AV > Info > Tool
[05b] BitDefender Online Scanner > Info > Tool(non-vendor)
[06] Blink Personal Edition AV >
Info > Tool
[07] BullGuard 8.5 AV > Info > Tool
[08a] Computer Associates 2007/2008 (all products) > Info > Tool
[08b] Computer Associates 2009 (all products) > Info > Tool
[09] Dr Web Anti Virus > Info > Tool
[10] eScan > Info > Tool
[11] ESET > Info > Tool
[12a] F-Protect AV 3.x > Info > Tool
[12b] F-Protect AV 6.x > Info > Tool
[13] F-Secure Products > Info > Tool
[14] G-Data 2010 > Info > Tool
[15] IObit > Info > Tool (Note: Cleans left-overs after a normal uninstall)
[16] TotalSecurity/K7 AntiVirus > Info > Tool
[17] Kaspersky AV > Info > Tool (Note: Removal of all versions of Kaspersky AV)
[18] LANDesk AV >
Info > Tool
[19] Malwarebytes'Anti-Malware > Info > Tool (Note: This tool is meant to be used after a normal uninstall of MBAM and a reboot)
[20a] McAfee Products >
Info > Tool
[20b] McAfee FreeScan > Info > Tool(non-vendor)
[21a] Microsoft Live OneCare >
Info > Tool
[21b] Microsoft Security Essentials > No Info > Tool(XP) - Tool(32bits) - Tool(64bits)
[22] NOD32 > Info > Tool
[23] Norman AV 5.x > Info > Tool
[24] Norton/Symantec 2010 > Info > Tool (Note: Removes all Norton products).
[25] Novell Inoculan >
Info > Tool
[26] nProtect AV 2007 > Info > Tool
[27a] Panda 2009 (and earlier) AV > Info > Tool
[27b] Panda 2010 AV > Info > Tool
[27c] Panda ActiveScan > Info > Tool(non-vendor)
[27d] Panda CloudAV >
Info > Tool
[28] Quick Heal > Info > Tool
[29] Sunbelt CounterSpy & Viper > Info > Tool
[30] SUPERAntiSpyware > Info > Tool
[31] Symantec ActiveX Control > Info > Tool
[32] ThreatFire 3.0 AV > Info > Tool
[33a] TrendMicro AV > Info > Tool (32bit) - Tool (64 bit)
[33b] TrendMicro HouseCall > Info > Tool(non-vendor)
[34] Verizon Internet Security Suite >
Info > Tool
[35] Webroot SpySweeper > Info > Tool