Scammers are targeting South Yorkshire residents by demanding payments to install anti-virus software on their computers.
Fraudsters are exploiting victims who are unfamiliar with activating or renewing antivirus software.
A spokesperson for Action Fraud said: "After buying brand new computers victims have reported being been unable to activate their antivirus software subscription, which led them to following links to fake antivirus websites.
"After entering contact information, victims have been called by fraudsters who ask for payment to install the anti-virus. This method has also been used by fraudsters when victims have attempted to renew their antivirus subscription."
For more information about how to protect yourself against this scam visit www.actionfraud.police.uk