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Boot windows 7 with no partition marked as Active?

post #1 of 3
Thread Starter 
I have windows 7 installed on my primary drive, but my laptop doesn't think there is an OS installed.
I don't know how, but I wonder if its been deactivated..

I was having trouble making a system image backup because windows thought there were system files on my D: drive which is just Steam and about 20 games, as well as my C:Windows. So my backup was about 600gb. I went into Disk Management and wanted to disable my D: somehow to make the backup. I right-clicked the Steam (D:) and marked as active and I didn't get the usual warning that this should have an OS installed if you mark as active. I deactivated it through command prompt and restarted the laptop. I never touched the C: in Disk Management but now my laptop doesn't think there is an OS installed..

Is there a way I can make the proper partition active or boot windows from a disk without reinstalling?
My Steam D: is made up of 2 harddrives in raid0 with 600gb of games on it and I'm really hoping I don't have to re-install windows.
post #2 of 3
You can change the active partition with command prompt. (Use the repair disc to open it)

1. diskpart
2. list disk
3. select disk [number]
4. list partition
5. select partition [number]
6. active

Hope this helps!
The Clunker
(11 items)
 
Lenovo Y40
(6 items)
 
 
CPUMotherboardGraphicsRAM
Core 2 Quad Q8400 Asus P5P43TD Powercolor 7950 4GB Patriot Viper 
Hard DriveHard DriveCoolingOS
80GB WD Caviar Blue 500GB WD Caviar Black Coolermaster Hyper TX Windows 7 Home Premium 64-bit 
MonitorPowerCase
20" Samsung Corsair CX600M Antec 300 
CPUGraphicsRAMHard Drive
i7-4510U R9 M275 2GB 8GB @ 1600MHz 500+8GB 5400rpm SSHD 
OSMonitor
Windows 8.1 14" 1080p 
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Reply
The Clunker
(11 items)
 
Lenovo Y40
(6 items)
 
 
CPUMotherboardGraphicsRAM
Core 2 Quad Q8400 Asus P5P43TD Powercolor 7950 4GB Patriot Viper 
Hard DriveHard DriveCoolingOS
80GB WD Caviar Blue 500GB WD Caviar Black Coolermaster Hyper TX Windows 7 Home Premium 64-bit 
MonitorPowerCase
20" Samsung Corsair CX600M Antec 300 
CPUGraphicsRAMHard Drive
i7-4510U R9 M275 2GB 8GB @ 1600MHz 500+8GB 5400rpm SSHD 
OSMonitor
Windows 8.1 14" 1080p 
  hide details  
Reply
post #3 of 3
Thread Starter 
Thanks that was all the problem was. I set the system reserved partition as active and ran repair, and it booted right up.
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