Antivirus Software Uninstallation Issues

  One thing I've faced about a few antivirus software is that they will not install if any other anti-virus software is present.In most cases no other softwares are installed;just leftover files are present in the C drive.
  These traces can then be removed using anti-virus removal tools made by the respective companies.These tools can also be used if the software cannot be removed using the Add/Remove option in control panel.
  For example to remove avast download the avast uninstall utility,boot into safe mode and run the utility.Here's the download link:
Avast Uninstall Utility: http://www.avast.com/eng/avast-uninstall-utility.html
  The steps to be followed are similar for other anti-virus software.Here's the link to download these tools:
1.AVG Remover: http://www.avg.com/download-tools
2.BitDefender Uninstall Tool: http://www.bitdefender.com/KB333-en--How-to-uninstall-BitDefender.html
3.F-Secure Uninstall Tool: http://support.f-secure.com/enu/corporate/downloads/removeav.shtml
4.Norton Removal Tool: http://www.softpedia.com/get/Tweak/Uninstallers/Norton-Removal-Tool.shtml
5.McAfee Consumer Product Removal Tool: http://www.softpedia.com/get/Tweak/Uninstallers/McAfee-Consumer-Product-Removal-Tool.shtml