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dollaratpizza

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unmountable_boot_volume blue screen in Vista

This is a dell 1535 laptop. The machine was infected with adware. Ran a Malware program that detected about 626 adwares. When the machine restarted started to get the unmountable_boot_volume blue screen. Tried to repair Vista but got error no had drive.
Removed the hard drive and attached it to another machine. The hard drive was recognized , it has 2 partitions - the one with the recovery is accesible but the remaing partition says inaccesbile .
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CPetrich12
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You can use a live Linux CD (Mepis is a good one) and use Linux's partition manager (gparted) to check to see if the flags on the primary partition.
Can you run a chkdsk /f/r from a command prompt on the system partition when it's connected to another machine?This may help the drive boot up again.

Ivano
Check to see what the drive letter is of the inaccessible drive in My Computer.

Start - Run then type CMD and hit enter.
at the command prompt type:
chkdsk F: /f/r

I used the letter F: as the inaccessible drive. Your drive letter may differ. There are 5 stages to the chkdsk. When completed eject your hard drive and install it in the Dell and try to boot up.

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dollaratpizza

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When I click on the drive in this case drive H:
This is the message H:\ is not accessible , this request could not be performed because of an I/O device error
Tried the chdsk command too from command prompt
this is the error message - access denied as you do not have sufficient priveleges. You have to invoke this utility running in elevated mode
 
Go to:

C:\Windows\System32\cmd.exe
Right-click on this file and select Run As Administrator.

The command prompt should appear. Try running the command.
Did you try running the chkdsk command in elevated mode already? See here for the steps to run it as administrator.
Tried it again
This time the message says - Its a RAW drive , chkdsk cannot check raw drives
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Ivano Viola
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when connected to the other pc, can you run malware scans? use these :
   Spybot :        http://www.download.com/3000-8022-10122137.html
http://www.malwarebytes.org/mbam.php                         MBAM
http://download.bleepingcomputer.com/sUBs/ComboFix.exe            Combofix
http://www.spychecker.com/program/hijackthis.html                                       download
http://www.hijackthis.de/index.php?langselect=english              check the log
Does it state the HDD as a RAW drive when you check it through Disk Management? You can access Disk Management by:
1) Typing Computer Management in the search bar & clicking Disk Management on the left pane;
2) Typing diskmgmt in cmd/powershell.
First you will need a Windows XP Pro or Win7Pro for this to work, otherwise follow the same steps but in SafeMode.

Make sure you are logged in as Admin
Connect the drive to a working PC
Right click on the affected drive
Click on Sharing and Security
Click on Security>Advanced>Owner

Under the list of Change Owner To:
Select the user you are logged in as. (Remember you must be an admin)
Now check the box to apply to sub-containers and objects

Once it is done, you will have full access to the drive.

If you can't install the OS again, it is probably because the DVD you have doesn't have the SATA drivers for your HDD, to fix this you will have to make your own ISO image of the OS with the drivers your Hard drive needs.