This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question Report abuse. Details required :. Cancel Submit. Bill Smithers Volunteer Moderator. There are no legal Vista ISO downloads available. When bootmgr is asked to start a boot item it identifies the item's Object by its GUID number and then reads the disk signature and partition offset information that is contained in that Object.
Bootmgr then scans the connected hard drives until it finds the drive with that disk signature and then jumps straight to the desired sector on that hard drive by using the partition offset information. The BIOS no longer has to be consulted to find the hard drive because bootmgr is not looking for a specific number of drive but just scanning all drives for a disk signature.
The partition table on the drive does not have to be consulted because bootmgr does not need to know the number of the partition or be told where that partition is. In some respects this new method could be seen as an improvement on how ntldr locates a drive and partition.
It means that Vista is not wholly dependent on the configuration of drives and partitions remaining completely static. A change to the partition's number by changing other partitions on the drive , or moving the position of a hard drive in the computer, will have no affect on bootmgr's ability to start any Vista OS that a BCD Object holds valid signature and offset information for.
Of course bootmgr will still have to be on the boot hard drive, or even a boot floppy, but the OS itself can have its partition number changed or its hard drive moved in the machine.
As long as the disk signature on a hard drive and the starting offset of the Vista partition still matches the ones in the Object, then bootmgr will find the OS. If you are using the Vista bootmanager to dual or multiboot with an earlier WinNT OS then you will still need to update its boot. Moving Vista There is a definite downside to this new arrangement for anyone who wants to move an install of Vista to another partition or hard drive. If either the signature or offset on the drive no longer match those that were written into an Object, then bootmgr will not be able to find the bootloader and so will give the error message that "winload.
For Windows 7 see winload. Of course winload. The information in the Object will need to be updated to correctly reflect new signature and offset details.
If you are using the Microsoft bootmanager and just have a simple set up of no more than a dual or maybe triple boot then the auto-repair from the Vista DVD might do this for you, that is if you have a full Vista DVD. For the slightly more able computer user the bootrec. If you are using a third-party bootmanager and your Windows installs are all independent then the DVD Auto Repair would be best avoided as it will try to configure the Windows bootmanager.
If you don't know what I mean by 'Independent' then try the guide here. How to use BCDEdit. You can also find an updated article on this topic here. They appear to be randomly generated and can have any value. I've found that as long as the GUID held in the bootmgr Object matches the one for the Vista Object, I can change them to any 32 digits I want and everything seems to function normally.
The 'Universal' GUIDs have a fixed value, which again appears arbitrary, that will be the same on every computer. Such Objects still contain the signature and offset of the drive and partition where the item is located and bootmgr does use this information to find it, so configuration changes do have an affect.
In Vista the BCD file will be open and held open permanently by the operating system. The primary reason for this may be for the hibernation function so that the BCD can be quickly reset for next boot to start the resume loader instead of winload.
My tests have shown that this is indeed what happens and the BCD is modified before hibernation shuts the computer down.
The new Vista 'Hybrid Sleep' is both sleep and hibernation and also sets the BCD in the same way that hibernation does, at least as far as I can tell. Other things that take advantage of the BCD always being open are the msconfig utility and the System Control Panel, both of which have options to make small non critical changes to a few BCD boot settings.
See note at the end for phone activation. You must download the. Run the. Windows installer will now start cancel the installer. To create a bootable. Select the browse folder button and select your Vista folder. Next select Advanced. Select the browse folder button and then navigate to your Vista folder and then select the boot folder and finally select the file called etfsboot.
Select yes when the prompt for the Volume Label comes up and then select ok. Finally wait for it to make the. Once one has the. This guide can be used in non-Dell systems but the note at the end of the wiki must be read before proceeding. Press the [Windows] and [Pause Break] button activation or right click Computer and select properties. At the bottom there will be some message about activation, click this link.
0コメント