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Windows 7: EFI CD/DVD has been blocked by the current security policy


13 Dec 2013   #1

Windows 7 Professional 32bit
 
 
EFI CD/DVD has been blocked by the current security policy

Just bought a Lenovo G500s Laptop. It has a driver CD that says `Lenovo Windows 8 Drivers`. I don't want the Windows 8 thing tho, so when I inserted my Windows 7 64 Bit OS I get this error:

EFI CD/DVD has been blocked by the current security policy

The error stays on screen for about 5 seconds then it takes me to some FreeDOS wall of text where I have to insert a new date and time.

How do I get it to boot?

EDIT. Solved: Went to BIOS (F2 or FN + F2) -> Boot.

Boot priority: Legacy Boot.
Boot device priority: SATA first.


My System SpecsSystem Spec
.

13 Dec 2013   #2

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Is this a OEM manufacturer's PC with Pre-installed Windows 8?

1) Downgrade to Windows 7.
Downgrade Windows 8 to Windows 7
Warning you must have the UEFI/BIOS firmware setting in Step Three set.

Make sure you read the NOTE at Step three.

2) If Using a USB Pen drive on a PC with a UEFI BIOS.
USB Pen drive need to be formatted to FAT32 as in
UEFI Bootable USB Flash Drive - Create in Windows
Take note of Step 11 for Windows 7.
Also you will need to use a USB 2.0 port, as there are no USB 3.0 drivers in Windows 7.


You will need to buy Windows 7.

Quote:
EFI CD/DVD has been blocked by the current security policy
You can only boot a Windows 8 x64 DVD/USB or 3rd party Partitioning, Backup & Cloning software, which fully supports Windows 8/8.1, UEFI, GPT & Secure Boot.
Which is signed by Microsoft.
My System SpecsSystem Spec
13 Dec 2013   #3

Windows 8 Core X64
 
 

Windows 8 is actually a pretty good OS, just needs some tweaks.

Windows 8 can be a bit difficult to use compared to Windows 7. It can be tamed though.

Start Button:
If you install Classic Shell (free) or Stardock's Start8 ($4.99) or similar software then you can have the Start button as it was in Windows 7 and boot directly to the Desktop. You can still play with Metro stuff but it's not forced on you.

Windows 7 Gadgets:
Windows 7 Gadgets are also available if you want them: 8GadgetPack - Gadgets for Windows 8

UAC:
I find UAC extremely annoying. If you do too then to (mostly) disable UAC, press Windows key + R to open the Run window.
Type msconfig and press Enter.
Click on the Tools tab.
Select Change UAC settings and click Launch.
Move the slider all the way to the bottom then click OK.
Some parts of UAC will still be alive, so to completely disable it you need to change a registry key.

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System
Key: EnableLUA
Set the value to 0

You cannot use any Metro Apps or the App Store when UAC is disabled. If you've gone this far,
you can also disable all hot corners so you will not get any of the Windows Charms popups.
Just check the Classic Shell and Start8 options to do this.

With these changes Windows 8 looks and feels like Windows 7.
My System SpecsSystem Spec
.


13 Dec 2013   #4

Windows 8.1 Pro
 
 

I'm currently using 8.1 on this newly built machine right now, and though I've been playing around with it on my laptop, it still takes some getting used to.

Anyway, can someone give me a better understanding of secure boot and Windows 8 - Why is this required?

Thanks
My System SpecsSystem Spec
13 Dec 2013   #5

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Quote   Quote: Originally Posted by sygnus21 View Post
I'm currently using 8.1 on this newly built machine right now, and though I've been playing around with it on my laptop, it still takes some getting used to.

Anyway, can someone give me a better understanding of secure boot and Windows 8 - Why is this required?

Thanks
Protecting the pre-OS environment with UEFI - Building Windows 8 - Site Home - MSDN Blogs
Secure Boot Overview
Secure Boot - Confirm Enabled or Disabled in Windows 8
Secure Boot - Enable or Disable in UEFI
My System SpecsSystem Spec
14 Dec 2013   #6

Windows 8.1 Pro
 
 

Just realized I hadn't posted a response

Thanks +1
My System SpecsSystem Spec
14 Dec 2013   #7

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Quote   Quote: Originally Posted by sygnus21 View Post
Just realized I hadn't posted a response

Thanks +1
You are welcome.
My System SpecsSystem Spec
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 EFI CD/DVD has been blocked by the current security policy




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