Bagi anda yang mengalami error pada PC atau Laptop/Netbook “Bootmgr is misssing” karena tiba-tiba drive C-nya menghilang, langkah-langkah berikut mudah-mudahan dapat membantu.

How To: Activate Hidden Windows 7 Administrator Account

Similar to former operating system Windows Vista, Microsoft’s new OS Windows 7 also has a built-in administrator account which is created when it is installed and it is disabled by default.Whenever you want to perform tasks under the administrator account with no UAC (user account control) in Windows 7, you need to enable the administrator account.You can go through this grand Administrator account to solve a problem or blocking rights, or simply activate it and keep it in reserve in case. You can enable the hidden administrator account in Windows 7 by any of the following three methods:

Method 1:Using Command Prompt

Open an elevated Command prompt in Windows 7 by right click on the command prompt and select “Run as Administrator”.After that you only need to enter the simple command below to activate it.

net user administrator /active:yes

You can also specify your password for this particular account by using the following command

net user administrator password

where you can replace “password” with your own password. You can see the account immediately after you logoff your Windows 7. In order to deactivate it, you can use the command below

net user administrator /active:no

This will effectively turn off the administrator account in Windows 7.

Method 2:Using Local Security Policy

Another way of activating the administrator account in Windows 7 is via Local Security Policy.

* Type secpol.msc in the search bar and hit enter.
* After the Local Security Policy pops up, navigate to Local Policies-> Security Options
* You can see an entry that reads Accounts: Administrator account.
* Double click the entry to enable it.

Method 3:Using Computer Management Policy

Another way of activating the administrator account in Windows 7 is via Computer Management Policy.

* Type compmgmt.msc in the search bar and hit enter.
* After the Computer Management window pops up, navigate to Local Users and Groups -> Users.
* In right-side pane double-click on “Administrator” account. It’ll open its Properties.
* Deselect “Account is disabled” option and Apply it.

Ref: http://www.tomstricks.com/how-to-activate-hidden-windows-7-administrator-account/

Selanjutnya ikutlah:

First of all, don’t panic. If your bootmgr file is missing that doesn’t necessarily mean that you lost any data, it simply means that your boot manager is missing, nothing more.

To repair your boot records, you have to launch the start-up option “repair your computer”. On boot-up press F8 to get to startup options. Click on “Repair your computer”:

Windows 7 Repair your computer

You’ll get a list of operating systems installed on your PC:

Windows 7 System Recovery Options

Select Operating System
Method 1: Repair bootmgr via Command Prompt

Open the command prompt.

Windows 7 System Recovery Command Prompt

Next, simply enter the following command to fix your boot record:

/fixboot

In case your master boot record has been damaged as well, I would also run

/fixmbr

Method 2: Repair bootmgr via “Startup Repair”

Theoretically, Windows 7 should be able to find and fix this error. If you click on “Startup Repair” instead of Command Prompt, then Windows will scan your system for common errors and will hopefully figure out that your bootmgr is broken.

Windows 7 System Recovery Command Prompt
Check disk for errors

Another error why you are receiving the “bootmgr is missing” error after installing Windows 7, might be that your hard drive has disk errors. It is always a good idea to also run the command

chkdsk C:\ /f /r

This might take some time, depending on the size of your hard drive, but it is necessary to verify that there are no corrupted files on your disk.

Read more: http://windows7themes.net/bootmgr-is-missing-in-windows-7.html#ixzz0edxvi5UB

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