The Stop 0x7B  Inaccessible Boot Device means the driver is not loaded and it cannot find the drive.

You may need to be more specific with the driver.

This is a microsoft support issue not a Dell hardware issue.

Add SATA/RAID drivers by editing only one file - TXTSETUP.SIF - which is placed in the I386 folder (C:\i386\TXTSETUP.SIF).

Intel® 82801GBM SATA AHCI Controller (Mobile ICH7M)

1. Comment out or remove anything under MassStorageDriver and OEMBootfiles you might have in WINNT.SIF.

2. Download the latest drivers and extract them.

3. Copy only the .SYS file (iastor.sys) to the C:\I386 folder it's important that the files are uncompressed.

4. In the C:\i386 folder you must now open the file TXTSETUP.SIF in your favorite text-editor and do the following:

4.1 Under the section [SourceDisksFiles] add:

iastor.sys   = 1,,,,,,_x,4,1

Remember to change the name of the sys file to the one you use!

4.2 Under the section [HardwareIdsDatabase] add:

PCI\VEN_8086&DEV_27C5&CC_0106 = "iaStor"

The information for your specific controller in the file TXTSETUP.OEM that you extracted with the driver.

4.3 Under the section [SCSI.Load] add:

iastor = iastor.sys,4

Change the names iastor and iastor.sys to your file's name.

4.4 Under the section [SCSI] add:

iastor  = "Intel(R) 82801GBM SATA AHCI Controller (Mobile ICH7M/DH)"

Change the name iastor to your file's name. I think the name in "" can be whatever you like, but I used the same name used in TXTSETUP.OEM just in case.

5. Save the file and exit.