Can I use Webroot anitvirus, System Mechanics with Norton 360.3?
As the other answer notes you cannot use two antivirus software programs. Additionally, System Mechanic is trash and will destroy your registry. Never use that. If you want to use a registry cleaner then use Ccleaner and/or Glary Utility. Both are free and trustworthy.* http://www.ccleaner.com/ http://glarysoft.com/ I would also recommend you install Malwarebytes which can be used with Norton. Get rid of Webroot.