Does windows 8 support uefi

If you get a Secure boot or signature error, you may wish to disable SecureBoot as described here , then retry to boot the disk. When the live session has loaded, run Boot-Repair see link for details. Then reboot the pc. Do not run Boot-Repair unless you have problems booting the computer; the expression "if it ain't broke, don't fix it" applies to this tool.

This should fix most boot problems. Leos Marek posted an update 3 hours, 19 minutes ago. For me it also broke my finger print scanner. Only solution so far is to remove the update. Leos Marek posted an update 3 hours, 21 minutes ago. Hi, i made some progress, the script can be used from Computer Client like Win10, and he dont need to import Active Directory modules, also dont need to enter config.

Brandon Lee wrote a new post, Redirect user profile folders documents, pictures, etc. For a long time, roaming profiles and folder redirection were the standard means under Windows for making user files available on different devices.

Now that more and more users work on the road or at home rather than in the office, this technique is becoming increasingly obsolete. An alternative to such environments is to redirect profile folders to OneDrive.

Paolo Maffezzoli posted an update 16 hours, 10 minutes ago. Paolo Maffezzoli posted an update 16 hours, 11 minutes ago. Paolo Maffezzoli posted an update 16 hours, 12 minutes ago. Please ask IT administration questions in the forums. Any other messages are welcome. Receive news updates via email from this site.

Toggle navigation. Author Recent Posts. Wolfgang Sommergut. Wolfgang Sommergut has over 20 years of experience in IT journalism.

He has also worked as a system administrator and as a tech consultant. Today he runs the German publication WindowsPro. Latest posts by Wolfgang Sommergut see all. Contents of this article. Related Articles. Ian 9 years ago. One of the main advantages is safe boot technology opportunity which allows to prevent unwanted programs execution during PC initializing we will discuss details of safe boot technology in the separate article.

Thanks to UEFI Windows 8 can be installed on drives with 3 Tb and more volume, and, correspondingly boot from this drives. UEFI usage instead of BIOS is one of the key moments which provides fast Windows 8 boot UEFI code works faster because it was written from the ground up without a necessity of entailing all old rules and compatibilities with it.

More over boot time decrease is achieved because there is no necessity of loader search on all devices, in UEFI the boot drive should be appointed at OS installation level. Notify me of followup comments via e-mail. Windows 7 confines the Bootloader program files in the first partition of the of the Hard Disc called "System Reserved" - a MB primary active partition automatically created by system at the time of Windows 7 installation.

The Bootloader files in this system partition are fully concealed and isolated, thus eliminating the chances of corruption by malware.

Windows 8 further extends the secure boot implementation of Windows 7, using trusted keys in Boot Manager to ensure that only properly signed and authenticated components are allowed to execute.

In addition, firmware access is limited to user control without any programmatic interface. The Secure Boot process is owned by vendors who are certified by UEFI to digitally sign their firmware files images which forms part of the firmware system. These trusted vendors share their trust key with the principal trust owner of the platform, generally represented by the OEM, who has to authenticate the digital signature on every image with its trust key, before allowing them to execute.

Secure Boot is localised in the UEFI firmware environment, from the ROM which being write protected acts as a safety device for the resident firmware to execute freely without authentication, to locations outside the ROM where the signature of all firmware images are authenticated before allowing them to activate.

Secure Boot ends with the loading of a certified Bootloader of the OS into memory. Trusted Boot takes over from where Secure Boot leaves off, to manage the booting of Windows components using trusted certificates.

At the point when Windows needs to load third party device drivers, Trusted Boot launches the Anti-Malware driver and hands over the task of malware identification to the Anti-Malware system. Windows 8 has prioritised the loading sequence of its Anti-Malware program so that it loads before any device drivers where rootkits are located. Regardless of whether you are using Windows Defender or a different anti-malware product, Windows 8 has tweaked its load process so that security software runs first.

By being launched first before any third-party driver, ELAM is able to detect malware in the boot process and prevent it from initializing. UEFI is a community effort by many companies in the personal-computer industry to upgrade the pre-OS environment. The forum is responsible for developing, managing and promoting UEFI specifications. Microsoft is a board member of this forum, and the forum is open to any individual or company to join free of cost. The private key is secret to the owner of the keys, and the Public Key is distributed openly.

The purpose of PKE is to render confidentiality to a message by encrypting it with the public key and then sending it to a recipient via an open channel, who can only decrypt the message using the secret private key. The purpose of a Digital Signature is to authenticate a software object by encrypting it with the owner's private key and enclosing the public key for ready decryption of the object, and openly distributed where confidentiality is not the requirement. In actual practice, the unencrypted object is accompanied by its digital signature which is decoded at the receiving end and compared with the unencrypted object for a veracity check.

However encrypting an entire object produces an unduly large Digital Signature which is therefore reduced by a hash function.

A hash is a complex algorithm which produces a unique ID from the binary of a software object. The purpose of the hash is to prove the integrity to a software object.

A hash of an object's binary is further encrypted and used as a digital signature to accompany the original unencrypted object. The receiver receives the unencrypted object and the digital signature enclosed by its public key and the hash function. The receiver uses the public key to unencrypt the signature and retrieve the hash; it then uses the hash function to derive the hash of the received unencrypted object. These two hashes if found identical, confirms the identity and the integrity of the received object.

This entity is the owner of a Trust Key pair that enables the root of trust on the platform and acts as the primal trust anchor from which the secure boot trust chain in built.

The owner is responsible to digitally sign the firmware files images in the first stage boot process located in UEFI motherboard OptionROMs with its private key. Platform security is enforced by PK which validates the digital signature of each image, before allowing them to execute.

The PK thus provides the foundation from which the authenticated boot process is built. KEK database is comprised of vendors who provide the second stage trust anchors in the secure boot chain. Only PK is authorised to write the vendor's digital certificate into KEK, which acts as a reference for validating the vendor credential presented during the boot process.

Vendors who are defined in the KEK are allowed to write to the Allowed Signature db database and Forbidden database dbx.

Like the platform security owner, these vendors maintain a pair of trust keys called Vendor's Production CA, of which the private key is used to sign its firmware images and the public key is provided in the Authorised Database db to authenticate the firmware images at run time. A trust chain is established where the root trust holder PK loads trusted vendors in KEK, and the KEK vendors loads trusted firmware images authenticated by the Allowed Signature db database. Thus PK in effect have a trust relationship with the images in db, and alongwith the images that is directly signed by it, PK reposes its trust on the entire set of firmware images that is part of the Secure Boot process.

There lies a catch however. With some time to invest, it can be a worthwhile effort to study and investigate the compatibility of the other operating system in Windows UEFI environment, at least after disabling Secure Boot. UEFI firmware was introduced by Intel as an upgrade to the age-old BIOS which has to be customised for every other firmware type and maintained for its life time.

Besides the BIOS was increasingly becoming the target of bootkits which remained generally undetectable by the Anti-malware system. The function of the Boot Mode is to boot the OS. The UEFI Flash is structured into distinct regions for its boot module, runtime module and data module for initialising the platform hardware.

Each Firmware Volume can have multiple logical partitions for dividing the main module into smaller functional components. The UEFI Boot specification segments the Boot process into 6 phases with definitive guidelines for developing the firmware script for each phase. Security SEC phase: When the system starts up, the CPU Cache is flushed and the processor executes the platform reset and initialisation routine directly from the Flash. Since the processor is in Real Mode, it operates through an Assembly Language Program specific to the firmware.

On a Hard boot, the CPU Cache is initialised with codes from the Flash to enable a memory model that permits Stack based C-code to be executed with only a few limitations.

The Security terminology is actually a misnomer as there is no security verification of codes executing in this phase. It is assumed that malware cannot target the Flash as the Flash update can happen only through signature verification. Driver Execution Environment DXE phase: This phase is designed to be platform independent, where the Device Drivers are loaded into memory and executed. It further works with DXE to determine if the device drivers required signature verification.

In Windows 8 PC, this partition is labelled as System. EFI case insensitive. A classic example of this is the Windows 8. In Windows 8. UEFI signing is a service provided by the Windows Dev Center hardware dashboard that lets you submit UEFI firmware binaries targeted to x86 or x64 computers for signing by Microsoft, so they can be more easily installed on computers running Windows 8 that use secure boot and execute code signed with the UEFI Certification Authority. The Evolution of Platform Firmware are classified as:.

No UEFI support is provided.