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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for May 3rd, 2021

authentication – Bypassing Windows 10 password with Utilman.exe trick – fixed? – Information Security Stack Exchange

Posted by jpluimers on 2021/05/03

It is debatable if these tricks are vulnerabilities or not: [WayBack] authentication – Bypassing Windows 10 password with Utilman.exe trick – fixed? – Information Security Stack Exchange.

There are arguments that leaving a system open to physical access or allow operating system manipulation, it means it is busted.

On the other hand, making systems more resilient to modification, helps alleviate these problems.

So it pays for developers to harden operating systems against modification.

From the question:

Of the sethc.exe, Utilman.exe, and osk.exe ones in Windows, Utilman.exe seems to have been fixed.

Related:

–jeroen

Posted in Power User, Windows, Windows 10, Windows 7, Windows 8, Windows 8.1 | Leave a Comment »

Supermicro: 5 BIOS beeps might just mean internal VGA is disabled

Posted by jpluimers on 2021/05/03

A while ago, I got a second hand Supermicro workstation and wondered why the IPMI KVM would not show anything.

The video card in it worked fine, so I used it as a desktop machine setup for a while, happily running VMS.

I finally decided to move into a closet, so I removed the video card, and rebooted.

Then it beeped 5 times, which was odd: I expected it to switch from the video card to the internal video. It didn’t.

Older BIOS codes: [WayBack] AMI BIOS Beep Codes – Thomas-Krenn-Wiki

From PDF [WayBack] BIOS POST Codes for C7/X9/X10/X11/B9/B10/B1/A1 Motherboards

PEI Beep Codes

# of Beeps Description
1 Memory not Installed
1 Memory was installed twice (InstallPeiMemory routine in PEI Core called twice)
2 Recovery started
3 DXEIPL was not found
3 DXE Core Firmware Volume was not found
4 Recovery failed
4 S3 Resume failed
7 Reset PPI is not available

DXE Beep Codes

# of Beeps Description
1 Invalid password
4 Some of the Architectural Protocols are not available
5 No Console Output Devices are found
5 No Console Input Devices are found
6 Flash update is failed
7 Reset protocol is not available
8 Platform PCI resource requirements cannot be met

So I did a bit of reading in the manual, then found about a jumper which had happily been living out of view, under the video card:

VGA Enable (JPG1)

JPG1 allows you to enable or disable the onboard VGA connector. The default position is on pins 1 and 2 to enable VGA.

Setting the jumper to pins 1&2 made internal VGA available again, it happily booted and showed in the IPMI KVM.

Later I understood why the jumper was set to VGA disabled: when having two video cards, by default Windows will extend your desktop to an invisible monitor.

The easiest workaround for that is just to disable VGA. However, you can also change Windows

Older versus newer boards

It appears that most older SuperMicro systems have a hardware switch, but for newer chipsets supporting Intel Quick Sync Video a there is a BIOS setting: [WayBack] Enable internal graphics in SUPERMICRO servers | Any IT here? Help Me!

Windows 10 fixing video cards and ACPI_BIOS_ERROR

The reboot did not work fine: Windows 10 would not initialise properly, but hung when detecting video cards.

Read the rest of this entry »

Posted in Hardware, IPMI, Mainboards, Power User, SuperMicro, X10SRH-CF, X9SRi-3F, X9SRi-F | Leave a Comment »

Windows 10: when “wmic path SoftwareLicensingService get OA3xOriginalProductKey” fails, try ProduKey from NirSoft.

Posted by jpluimers on 2021/05/03

Somehow, many Windows 10 systems, when I try on an Administrative command prompt wmic path SoftwareLicensingService get OA3xOriginalProductKey, the result is empty:

Microsoft Windows [Version 10.0.17763.475]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>wmic path SoftwareLicensingService get OA3xOriginalProductKey
OA3xOriginalProductKey



C:\WINDOWS\system32>

On those systems, [Wayback] NirSoft ProduKey always works.

Having a product key at hand is a great help when re-installing Windows 10: often it does not automatically obtain a digital license on the same hardware.

Most of those systems have been upgrades from previous Windows versions, but not all of them: even some new systems have this behaviour.

Related:

–jeroen

Read the rest of this entry »

Posted in Power User, Windows, Windows 10 | Leave a Comment »

 
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