LockHunter - It is a free tool to delete files blocked by something you do not know.
OpenDNS - OpenDNS provides faster and safer Internet access for your home or Business.
IObit Unlocker - Never Worry about “Cannot Delete Files” on Your PC
Comodo Secure DNS - Comodo Secure DNS is the leading DNS provider. We offer Managed DNS, Enterprise DNS, Authoritative, Anycast and CDN DNS hosting.
EMCO UnLock IT - Unlock file or folder, locked by the system or by an application
GreenTeamDNS - GreenTeamDNS is an all-in-one advanced level Domain Name Service that is completely cloud-based and known as a cyber-fileting service, protects you from malware and phishing websites, and all the unpatented or offensive content – all based on simple…