下面是ESET提供的相关杀毒软件卸载方法，一个电脑安装多种杀毒软件可能会导致系统崩溃，所以建议安装NOD32之前先卸载其他杀毒软件，以免产生冲突。
Uninstallers (removal tools) for common antivirus software
KB Solution ID: SOLN146|Last Revised: May 21, 2012
Running two antivirus products on the same computer can degrade performance and cause system instability. It is important that any previously installed antivirus software is uninstalled from your system before installing your ESET security product. Typical uninstallation* using the Windows removal tool (Add/Remove Programs) is often insufficient.
Click the link associated with the antivirus software currently installed on your system and follow the prompts or instructions on the website.
After uninstallation is complete, you will need to restart your computer. You may then proceed with installing your ESET security product.
Avast http://files.avast.com/files/eng/aswclear.exe
AVG http://www.avg.com/us-en/utilities
Avira http://www.avira.com/en/support-for-free-knowledgebase-detail/kbid/88
BitDefender http://kb.bitdefender.com/site/article/333/
BullGuard http://www.bullguard.com/support/product-guides/bullguard-internet-security-guides/uninstall.aspx
CA Antivirus
http://homeofficekb.ca.com/CIDocument.asp?KDId=3125&Preview=0&Return=0&GUID=DF325E0AA0AB4264AF47E4BEA49F571B
Comodo Internet Security https://support.comodo.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=298
CounterSpy http://support.sunbeltsoftware.com/Business/2VIPRE_Enterprise/3.1/Console/Uninstall%2f%2fReinstall
Cyber Defender Early Detection Center http://cyberdefender.custhelp.com/app/answers/detail/a_id/207
Dr. Web https://support.drweb.com/support_wizard/?lng=en (Only registered Dr. Web users can access support content)
eScan http://www.microworldsystems.com/download/tools/esremove.exe
ESET http://kb.eset.com/esetkb/index?page=content&id=SOLN2788
FRISK F-PROT Antivirus for Windows http://www.f-prot.com/support/windows/fpwin_faq/25.html
F-Secure http://www.f-secure.com/en/web/home_global/support/article/kba/2109/k/uninstall+f+secure/p/1
G Data https://www.gdatasoftware.co.uk/?eID=PushFile&dl=f4b2f2fd23%3AAFEIBgU%3D
Kaspersky http://support.kaspersky.com/kis2010/service?qid=208279463
Kingsoft http://www.kingsoftsupport.com/forum/viewtopic.php?f=30&t=59&sid=9e4c506ea22db37a60ab1b7364544d6a
K7 Total Security http://www.k7computing.com/en/tools/K7RT.exe
LavaSoft http://www.lavasoftsupport.com/index.php?showtopic=28
McAfee http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe
Norman Virus Control/Norman Security Suite http://www.norman.com/support/support_issue_archive/67798/en
Norton (Symantec ) ftp://ftp.symantec.com/public/english_us_canada/removal_tools/Norton_Removal_Tool.exe
Panda http://www.pandasecurity.com/resources/sop/UNINSTALLER_08.exe
Pareto Logic http://techsupport.paretologic.com/plsupport/consumer/kbdetail.asp?kbid=555
Sophos http://www.sophos.com/support/knowledgebase/article/11019.html
Trend Micro http://esupport.trendmicro.com/1/How-do-I-remove-old-or-new-versions-of-Trend-Micro-products-in-my-comp.aspx
Trend Micro Titanium http://esupport.trendmicro.com/solution/en-us/1056455.aspx
Vipre (Sunbelt Software) http://www.sunbeltsoftware.com/support/VPE/AgentRemoval3.1.exe
Webroot http://support.webroot.com/cgi-bin/webroot.cfg/php/enduser/std_adp.php?p_faqid=1761
Windows Live OneCare http://download.microsoft.com/download/4/c/b/4cb845e7-1076-437b-852a-7842a8ab13c8/OneCareCleanUp.exe
Windows Security Essentials http://support.microsoft.com/kb/2435760
Zone Alarm http://download.zonealarm.com/bin/free/support/download/clean.exe
*ESET does not take responsibility for any damages or loss of data caused by or during the uninstallation of any antivirus software.
原文地址：
http://kb.eset.com/esetkb/index?page=content&id=SOLN146
http://www.eset.tw/html/49/47/