BCU doesn't change "Fast Boot" setting

[jmPRodriguez]

I cannot enter BIOS pressing F10 when the laptop is starting. After a lot of googling I came across HP BIOS Configuration Utility (BCU) and instructions to disable "Fast Boot" as a solution to this issue. 

But I'm not getting this setting changed. After executing cmd as Administrator and running

BiosconfigUtility64.exe /setvalue: "Fast Boot", "Disable"

I get this message:

<BIOSCONFIG Version="" Computername="DESKTOP-CLMODEE" Date="2017/10/19" Time="17:31:28" UTC="2">
        <SETTING changeStatus="warning" name="" returnCode="20">
                <OLDVALUE><![CDATA[]]></OLDVALUE>
                <VALUE><![CDATA[]]></VALUE>
        </SETTING>
        <ERROR msg="An operation failed" />
        <ERROR msg="BCU return value" real="20" translated="20" />

and the Fast Boot continues "Enabled", as shown with: 

BiosconfigUtility64.exe /getvalue:"Fast Boot"

which returns:

BIOSConfig 1.0
;
;     Originally created by BIOS Configuration Utility
;     Version: 4.0.23.1
;     Date="2017/10/19" Time="17:06:02" UTC="2"
;
Fast Boot
 Disable
 *Enable

Any help will be most appreaciated!

Jose M.

[jmPRodriguez]

I've found where the problem was. Removing  the space between ":" and parameter works. So, the command is:

BiosconfigUtility64.exe /setvalue:"Fast Boot","Disable"

and F10 enters the BIOS screen.