fail to install Extension pack

[yanivbi]

my version : VirtualBox Graphical User Interface Version 5.1.2 r108956

failure: Failed to install the Extension Pack D:/Users/Yaniv/Downloads/Oracle_VM_VirtualBox_Extension_Pack-5.1.2-108956.vbox-extpack.

The installer failed with exit code 1: VBoxExtPackHelperApp.exe: error: Failed to rename the temporary directory to the final one: VERR_ACCESS_DENIED ('C:\Program Files\Oracle\VirtualBox\ExtensionPacks\Oracle_VM_VirtualBox_Extension_Pack-_-inst-14896' -> 'C:\Program Files\Oracle\VirtualBox\ExtensionPacks\Oracle_VM_VirtualBox_Extension_Pack')

rcExit=1.

Result Code: E_FAIL (0x80004005) Component: ExtPackManagerWrap Interface: IExtPackManager {edba9d10-45d8-b440-1712-46ac0c9bc4c5}

[Socratis]

Duplicate of #15731, except that the host is properly set in #15731.

[Frank Mehnert]

Duplicate of #7972. Try the suggestion in the most recent comment (Disabled McAfee Real Time Scanning and was able to install the ext pack successfully).