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Windows 7: Unmountable boot volume BSOD - Win7.64

16 Dec 2014   #1

Windows 7 Home Premium 64bit
Unmountable boot volume BSOD - Win7.64


When booting or trying to repair, I get Unmountable_boot_volume BSODs.

Before that:
- blue screens caused by defective RAM, so i kept the only running module in my laptop
- then very slow boot (up to 20 min) and windows sessions
- then BSOD mentioning Iastor.sys
- and now Unmountable_boot_volume when trying to boot or repair startup.

I have Hiren and WinRE (but no Win7 installation disc), so I tried various things, like fixing MBR but it tells me he can't find a system volume, repairing with WinRe but, of course, no system partition is listed in the box.

I also have setup my HDD to IDE instead of AHCI in the BIOS.

At this point, what should I do?


My System SpecsSystem Spec
17 Dec 2014   #2

7 x64 Ultimate

Run Checkdisk and the manufacturer's hard disk diagnostic utility. If the drive is good, try Minitool Partition Wizard (free).
My System SpecsSystem Spec
17 Dec 2014   #3

Windows 10 Pro/ Windows 10 Pro Insider

Look in your bios and see if the hard drive is seen. If it is, try running startup repair Startup Repair

If it is not try running the DOS version of Seatools SeaTools for DOS and Windows - How to Use

If you do not have an Installation disk in this clean install tutorial, look under Here's How in the blue note section for a link to the Windows 7 download link, just be sure to download the same version you currently have. Clean Install Windows 7
My System SpecsSystem Spec


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