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Got a failure at checkpoint USBd on my Dell, followed instructions and changed the boot emulation to No Boot. Fixed my boot up issue but created an issue with my Microsoft Lifecam Cinema and Yahoo Mesenger. After loading YM, if I try to start my cam the whole computer freezes forcing me to do a hard reboot. I uninstalled and re-installed both the webcam and YM 10 with no success, still freezes. Canrun the webcam by itself with no issues and the same with YM. I loaded Skype and have no issues running it with my webcam. Loaded Driver Detective and have updated all drivers. Went into device manager and uninstalled/re-installed all the USB host controllers, again, no success. Even moved the cam to other ports on the back and also the ports on the front of the computer with no success. I do not get any error messages. what am I missing?

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  • Randal Gile Oct 08, 2010


    First off here is some more info;

    Dell Dimension 8300 with Win XP OS (desktop)

    I read your answer and followed your instruction with the uninstall/re-boot/install etc. After windows loaded the webcam (microsoft lifecam cinema) I went and double checked all the settings on yahoo messenger tobe certain I didnt miss anything. Hit the webcam button and messenger froze immediately. Moved on to Skype, attempted a video call and was able to connect with voice using the lifecam microphone but was unable to load the video. So, using to seperate programs I have been unable to get any webcam imagery. To further check the the integrity of the webcam, I unplugged the Lifecam and rebooted with a Logitech Pro 4000 webcam now plugged into the same USB port that the Lifecam ocuppied. Windows loaded the Logitech cam and the cam was working on its own as does the Lifecam when not being loaded by any messenger or skype. Once again, I tried loading the Logitech using YM and YM froze up immediately.

    So at this point, I have 2 cams that are working properly when they are standing alone, but both cams will not respond to either Skype or YM, freezing both applications. Both the Lifecam and the Logitech cam were found by both programs and they were listed in each drop down menu respectively.

    As I mentioned before, this webcam problem started immediately after I rectified the USBd checkpoint issue with the Dell, Again, I went into the bios and turned the boot emulation to 'no boot" to correct or at the very least work around the checkpoint error. The computer boots up without any problem now but has left me with this aggravating cam issue.

    So, I cant help but think that going into the bios and changing the boot emulation to 'no boot' has created this whole mess.

    Can you look further into this using the new info and maybe come up with another plan? Calling Dell is not very high on my list of fun things to do. This computer is a hand me down so they will not have my name registered to this computer. The service tag on this machine is; 8VQG051.

    Sincerely ,

    R G crockpotman



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Please follow the link to uninstall and then reinstall the device on your Dell. Remember that reboot is as important as the drivers. You have tried almost everything on your own. Now try out my method.
If by any chance the problem persists then you may like to call up the Dell online help. It is toll free. They do not have any service centers and do every thing online. On the back of the laptop/computer you will find a 7 character number. Just keep it handy while you talk to them. They would know how to deal with your machine.
But, first try my method.

Posted on Oct 06, 2010

  • Rinoo Kumari Oct 06, 2010

    The Dell toll free number is 1-866-795-5597



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Dell 8400. previous attempts at booting this system have failed at Checkpoint [Writ]. Is this a Hardware or Software problem and have you suggestions for a fix to problem.

It is a Hardware error, and my be associated with the following components.
  1. Memory. Try Memory modules individually, see if you can get the system to boot normally with one or more modules, if you ID a defective one, replace it.
  2. Motherboard. It is possible, that if all combinations of the memory produce change that a failure has occurred in the motherboard. A swollen capacitor is a likely failure.
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I have bought a new Lexmark x5650 Printer. The setup all went fine but everytime i boot my PC running Windows XP the screen just hangs. When you take the USB cable out of the Printer the PC carries on...

Issue: Computer will not boot with the device connected via USB to the PC
Solution: Disable USB Emulation (legacy support) in the computer BIOS

Turning off USB Emulation (legacy support) in the computer's BIOS
The following steps are for Dell computers. If this issue is occurring on another brand computer, the process of entering the computer's BIOS may be different. Additionally, the steps to make changes may differ as well. Refer to the computer's documentation to verify the appropriate steps to disable USB Emulation.
For Dell computers, perform the following steps:
While rebooting the computer, press the <F2> key to enter the System Setup (BIOS).

Press the Down Arrow <?!> key repeatedly until 'Integrated Devices' is highlighted.

Press <Enter> and another window appears.

Press the Down Arrow <?!> key repeatedly until 'USB Emulation' is highlighted.

Press the Plus <+> key to change the value to 'OFF'.

Press the <Esc> key to exit this window.

Press the <Esc> key again to exit the System Setup (BIOS).

When the message "Do You Want to Save Changes And Exit" appears, press the <Enter> key indicating Yes to save changes. The system will reboot.

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1 Answer

Boot failure at USBd checkpoint

There are 2 steps you can do to fix the problem

1. Change the USB Emulation Setting in the BIOS
NOTE: It is recommended to disconnect any USB devices before performing the following steps.
Restart the system.
Wait until the Dell Logo appears.
At the Dell Logo screen, press F2 right away to enter the System Setup.
The System Setup screen will appear.
Press the down arrow key to highlight Integrated Devices (LegacySelect Options).
Press Enter.
A small box with a list of devices appears in the middle of the screen.
Press the down arrow key to highlight USB Emulation.
The default setting is On.
Press the Space Bar on your keyboard to change the setting to No Boot.
Press the Esc key.
The small box disappears.
Press the Esc key again.
A small box with list of options appears in the middle of the screen.
Make sure that Save Changes and Exit is highlighted in blue.
Press Enter.
The system will then restart.
The recommended changes have now been made to the BIOS.

2. Reset the Dell Dimension desktop System Setup (BIOS) to factory defaults.
Restart the system.
The Dell logo screen appears.
Press F2 to enter the System Setup (BIOS).
The System Setup screen appears.
Press the ALT + F key combination.
Press the Esc key to Save and Exit.
Press Enter to Save changes and exit now.
The BIOS is now set to the default settings.

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My dell dimension 8400 bios a03 fails to bootup and displays this alert on the screen: Many attempts to boot the system have failed at checkpoint [Ithr]. how can i recover from this?

You need to reset your bios settings. Open your case and remove the cmos battery for 10 minutes. Caution: unplug all ac plugs before you open your case. put the battery back in and turn it on you should see an error message saying: you need to set system time and date. If you see this then you have successfully reset your bios settings and the defaults should load up. follow the instructions to change your time and date settings and save. reboot and hopefully you can boot up. I hope this works.

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I understand that your Isue is "After installing the HP All-in-One software, the computer stops responding during start up when the All-in-One is connected and turned on. The computer will start correctly if the All-in-One is not connected or is turned off."


This problem can be resolved by changing the "USB Emulation" in the Computer BIOS settings.
If you are using a DELL Computer just follow my instruction below.

If you are using a USB keyboard, do not disable “USB Emulation”, “USB Keyboard Support”, or “USB Legacy Support”. If the settings must be disabled, use a PS/2 keyboard

Changing the BIOS on a Dell Dimension computer
Follow the steps below to turn off the ability to boot from USB devices but still support a USB keyboard while starting. Contact Dell for assistance if necessary.
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  2. Unplug all USB devices other than a keyboard.
  3. Start the computer. When the Dell logo displays, press the F2 key to enter the System Setup (BIOS) program. If the Windows screen displays, wait for the computer to finish starting up, shut it down, and then try again.
  4. Press the Down Arrow key to highlight Integrated Devices (Legacy Select Options).
  5. Press the Enter key.
  6. Press the Down Arrow key to highlight USB Emulation .
  7. Press the Space Bar until the “ No BOOT ” option displays.
  8. Press the Esc key twice to go to the Exit menu.
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Changing the BIOS on a Dell Laptop PC.
Follow the steps below to turn off the ability to boot from USB devices but still support a USB keyboard while starting. Contact Dell for assistance if necessary.
  1. Shut down the portable.
  2. Unplug all USB devices including USB keyboards.
  3. Start the laptop. When the Dell logo displays, press the F2 key to enter the System Setup (BIOS) program. If the Windows screen displays, wait for the computer to finish starting up, shut it down, and then try again.
  4. Press and hold the ALT key while tapping the P key until a screen displays that includes the words “ USB Emulation ”.
  5. Press the Down Arrow key to highlight “USB Emulation”.
  6. Press the Right Arrow key until the “Disabled” option displays.
  7. Press the Esc key once to go to the Exit menu.
  8. Plug the USB devices back in.
  9. Ensure that “Save Changes and Exit” is highlighted, and press the Enter key. Contact Dell for assistance if the problem still exists
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Items in blue which are underlined are clickable to give more information about the process

Start the System Restore Utility at a command prompt

1. Restart your computer, and keep tapping F8 during the initial start-up until you get options, select Safe Mode with a Command Prompt then press enter.

2. Log on to your computer with an administrator account or with an account that has administrator credentials.

3. Type the following command at a command prompt, and then press ENTER:


4. Follow the instructions that appear on the screen to restore your computer to an earlier state.

Look for the most recent system checkpoint created before the errors to restore from

For additional information about the Safe mode with a command prompt, click the following article number to see a description of the Safe Mode Boot Options in Windows XPthe article in the Microsoft Knowledge Base: 315222

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1 Answer


One of the greatest factor in intermittent shutdowns is because of heat issues. try to check the fans if they are all spinning. if all fan's are ok then you only need to replace the motherboard. here's a manual that might come in handy

Hope this helps.


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