LockHunter - It is a free tool to delete files blocked by something you do not know.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
IObit Unlocker - Never Worry about “Cannot Delete Files” on Your PC
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Wise Force Deleter - Delete Any File That Windows Can’t Delete.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.