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Windows 7: NoOsinstalled issue

04 Jul 2011   #1

Windows 7 professional x64
NoOsinstalled issue

Hello everyone,
Need your help to solve that annoying problem please.
Last night I noticed a Trojan on my pc and tried to get rid of it by using the ComboFix utility. That thing screwed my file system..
After he completed I rebooted my pc and I'm not able anymore to get my win7 working properly.
When I try to boot i get The black screen with "File:\Boot\BCD Status:0xc0000098 Info:The Windows Boot Configuration file does not contain a valid OS entry" error.
I've tried every solution I found on the web like:
Bootrec fixes,
Diskpart fixes,
Startup repair from win DVD says NoOsinstalled
I would really like to solve this without formatting the pc, got shiploads of programs and configuration on it and it would require too much time to re-install everything, I need to work for a important project and need to be done tonight damn :-(

Seems like my pc doesnt see my win os!
Anyone please can give me some good advices please?


My System SpecsSystem Spec
04 Jul 2011   #2

Windows 8.1 Pro x64 x3 + Windows 10 Preview, Ubuntu

Combofix is a very powerful program and use by untrained users can completely destroy all data on a system , this may have happened to you.

We do have members here who are trained in it's use but as they are I think, all in the USA, and it is 4th July holiday, and you need assistance urgently, I suggest you go to the Bleeping Computer site and ask for help.

Bleeping Computer - Computer Help and Discussion

Hopefully someone there might be able to provide you with help
My System SpecsSystem Spec
04 Jul 2011   #3

Windows 7 professional x64

thanks i've just copy paste the issue on it, hopefully will solve the problem
My System SpecsSystem Spec
04 Jul 2011   #4

Windows 8.1 Pro x64 x3 + Windows 10 Preview, Ubuntu

Good luck, I hope they can help you
My System SpecsSystem Spec
04 Jul 2011   #5

Microsoft Community Contributor Award Recipient


Boot up using the Startup disk CD or Windows 7 DVD. (not the OEM manufacturer's Recovery Disk) If you have a Netbook, needs to be on USB Pendrive.

IMO, Use the Rebuild BCD first in this tutorial:

Do a Strartup Repair:
Startup Repair
Note: You may need to do startup repair 3 to 4 times.
Startup Repair - Run 3 Separate Times
Your Windows installation must show at this screen.

Name:  Startup Repair 1.PNG
Views: 12
Size:  110.5 KB Name:  Startup Repair 2.png
Views: 12
Size:  112.9 KB

If not showing check out the list below.
1) Run Startup Repair once,(drive may be marked inactive) this will mark the drive ACTIVE.

2) Your HD is plugged in to the first Sata port on the MOBO, & first HD boot in BIOS.

3) Make sure your HD is show in BIOS.

4) Check all cables for a good fit.

5) Check to see your HD is listed in dartpart.
DISKPART : At PC Startup
type list disk.

Name:  Startup Repair 3.PNG
Views: 113
Size:  134.2 KB

6) Load the Sata Controller Drivers:
SATA Drivers - Load in Windows Recovery Options
Only needed, if you used when installing Windows.

7) Restore MBR.
MBR - Restore Windows 7 Master Boot Record

8) Use the Rebuild BCD in this tutorial:
How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair startup issues in Windows

9) Check your computer for virus or malware.

10) Mark the Windows HD ACTIVE:
Partition - Mark as Active

Still not showing.
11) Check the hard drive with the manufacturer's diagnostic tools.
Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
HD Diagnostic

If you have not made your Startup Repair
System Repair Disc - Create
Do you have a mate with Windows 7 & CD/DVD RW Drive, how could burn one off.
If you have a Netbook, you can make a Startup Repair or install disk using Method two of this tutorial:
USB Windows 7 Installation Key Drive - Create
on your mate's PC.

Startup Repair Infinite Loop Recovery

System Recovery Options
System Restore

My System SpecsSystem Spec

 NoOsinstalled issue

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