These are companies recognized by malwarebytes as scamming artists because they meet these criteria:

• #1 Pretends to be working for Microsoft, ‘Windows’ or Malwarebytes.
• #2 Uses misleading tactics to force a sale.
• #3 Finds viruses, malware or an infection on a perfectly clean system.
• #4 Validates a fraudulent popup or page as legitimate.

• Geeks Technical Support LLC
  Website(s):malware-support-help.org, geeksdrivesavers.com
  
• Thy Tech Support
  Website(s):ThyTechSupport.com
• OMG Tech Help
  Website(s): omgtechhelp.com
  
• HPC Techs LLC
  Website(s): hpctechs.com
  
• Your 365 Tech Support
  Website(s): your365techsupport.com
• Tech Support Experts (could be linked to MyTechGurus)
  Website(s): tech-support-experts.com, chat123.us
• Microtek Support
  Website(s): microteksupport.com
  
• MyPCTech24
  Website(s): mypctech24.com
• Yoda Care
  Website(s): yodacare.com
• OneBit IT
  Website(s): onebitit.com
  
• iTech Expert
  Website(s): itechexpert.us
  
• Tech World Wide Helpdesk
  Website(s): techworldwide.org
  
• LiveTechOnCall, Live Tech On Call, AVIVO LLC
  Website(s): livetechoncall.com
• American Tec Help
  Website(s): americantechelp.com
  
• ProcomSupport247
  Website(s): procomsupport247.com
  
• Cump Tech Media Pvt Ltd
  xevoke.com,onlineinstanthelp.com
• E-Racer Tech (Clean IT PC)
  Website(s): e-racertech.com, cleanitpc.com
• Ecomputer Support
  Website(s): ecomputersupport.net 
• OMG Tech Help
  omgtechhelp.com
  
• SysCare247
  Website(s): syscare247.com
  
• 247 Support Experts
  Website(s): 247supportexperts.com, 3wayhelp.com
  
• AOLrisk
  Website(s): aolrisk.com
  
• Condis Services
  Website(s): condiservices.com
  
• PC Tech Clinic
  Website(s): pctechclinic.com
  
• Comlogic
  Website(s): comlogicinc.com
  
• 1844desktop
  Website(s): 1844desktop.com, allinonetech.net, allinonetech.us
  
• Internet Security Protect
  Website(s): internetsecurityprotect.com
  
• iMax Support
  Website(s): imaxsupport.com, fix247.org
• TechFix Pro
  Website(s): techfixpro.com
  
• Compute My PC
  Website(s): computemypc.com
  
• iGennie
  Website(s): igennie.net
• PC Toolkit Pro
  Website(s): pctoolkitpro.com
• Click4Support
  Website(s): lickforsupport.net, webtechmasterhelp.com, techsupportcenter.org, techsupportive.com
  
• GBM Support
  Website(s): gbmsupport.net
  
• MegaITSupport
  Website(s): megaitsupport.com
  
• My Tech Gurus
  Website(s): mytechgurus.com
• PC Mask
  Website(s): pcmask.com
  
• PC Smart Care
  Website(s): pcsmartcare.com, pcsmartcare.us
  
• Speak Support
  Website(s): speaksupport.com, 121usa.com  
• 365 Tech Help
  Website(s): 365techhelp.co/bng/slow-pc, fastsupport.com