Windows seven missing operating system.

Problems started with windows updates failing,i went through the malware cleaning process on the malware forum and got the all clear.
I ran the acer recovery tool and got an error message-

The exception unknown software exception (0xc000000d) occurred in the application at location 0x1006b6e2.

Click ok to terminate the program.

I clicked ok as there was no other option and the screen went black with the message- missing operating system

What can i do now,i have no disc with the pc.

 

The error code you describe indicates that you have some corruption in your Boot Configuration Database, which houses the operating system information and supplies it during the boot process. The simplest solution would be to recreate the BCD from a Windows Recovery Environment, such as booting to your installation media and launching Command Prompt from the tools option after selecting the hyperlink for repairing windows. The process is illustrated in this article from Microsoft Support.

Once you have accessed a Command Prompt enter:

Code:

bcdedit /export C:\BCD_Backup
c:
cd boot
attrib bcd -s -h –r
ren c:\boot\bcd bcd.old
bootrec /RebuildBcd

This will rename the existing BCD which is corrupt and create a new BCD, then search your system for applicable operating system files from which the system can be boot.

 

You made a typo in the URL, it should be:

http://support.microsoft.com/kb/927392

 

Thank you, I didn't catch that when posting.

 

In order to follow the advice given you need a repair disc, which you've already said you do not have. Take a look at post #15 on in THIS THREAD and d/load a repair disc ISO. Burn that to a CD and reboot to it and you will then have access to the command prompt.

 

Also, if you are like me, and hate using cds or dvds you can use a usb drive.
Download Microsoft Windows 7 USB/DVD Download Tool For Free ...

That is what I use for all .iso's from windows 7, to server 2008 r2.

 

The Windows 7 USB/DVD Download Tool is very useful, for only a few computers it is quick and easy and gets the job done.

Since you describe using it for multiple operating systems, I would recommend the Microsoft Deployment Toolkit (MDT) as an alternative, particularly if you have a Windows Server available on the network with WDS which you can enable for PXE booting. One central database completely customizable with all of your operating systems, drivers, applications, etc. which you can access over the network without any media whatsoever makes rolling out new operating systems a breeze. Whether for a regularly updated virtual environment or a workbench for new systems or an entire multi-site organization, MDT is definitely the way to go. If this is your first introduction to MDT, the Deploy Windows 8 with MDT video is a great place to start.