Tip & How-To about Computers & Internet

One Reasons why PCs crash.

Fatal error: the system has become unstable or is busy, "it says. "Enter to return to windows or press Control-Alt-Delete to restart your computer. If you do this will lose any unsaved information in all open applications."
You have just been struck by the Blue Screen of Death. Anyone who uses Mcft Windows will be familiar with this. What can you do? More importantly, how can you prevent it happening?

Hardware conflict:
The number one reason why windows crashed is hardware conflict. Each hardware device communicates to other devices through an interrupt request channel (IRQ). These are supposed to be unique for each device.
For example, a printer usually connects internally on IRQ 7. The keyboard usually uses IRQ 1 and the floppy disk drive IRQ 6. Each device will try to hog a single IRQ for itself.
If there are a lot of devices, or if they are not installed properly, two of them may end up sharing the same IRQ humber. When the user tries to use both devices at the same time, a crash can happen. The way to check if your computer has a hardware conflict is through the following route.

* Start-Settings-Control Panel-System-Device Manager.

Often if a device has a problem a yellow '!' appears next to its description in the Device Manager. Highlight Computer (in the Device Manager) and press Properties to see the IRQ numbers used by your computer. If the IRQ number appears twice, two devices may be using it.

Sometimes a device might share an IRQ with something described as 'IRQ holder for PCI steering'. This can be ignored. The best way to fix this problem is to remove the problem device and reinstall it.

Sometimes you may have to find more recent drivers on the internet to make the device function properly. A good resource is www.driverguide.com. If the device is a soundcard, or a modem, it can often be fixed by moving it to a different slot on the motherboard (be careful about opening your computer, as you may void the warranty).

When working inside a computer you should switch it off, unplug the mains lead and touch an unpainted metal surface to discharge any static electricity.

To be fair to Mcft, the problem with IRQ numbers is not of its making. It is a legacy problem going back to the first PC designs using the IBM 8086 chip. Initially there were only eight IRQs. Today there are 16 IRQs in a PC. It is easy to run out of them. There are plans to increase the number of IRQs in future designs.
Good luck!

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HOW TO DETECT THE CD ROM USING PHOENIX ROM BIOS PLUS VERSION 1.10 A02


The BIOS information is typically found at or near the top of the POST screen for a very short time ALR PC non / PCI = CTRL+ALT+ESC AMD advanced micro devices=BIOS = DEL Award BIOS = DEL Dtk Datatech Enterprises Co. BIOS = ESC Phoenix BIOS = CTRL+ALT+S Phoenix BIOS = CTRL+ALT+INS Restart your computer during the boot process you will see on the screen to press a certain key usually Delete or F2 to enter setup
this will differ depending on which bios you have Press and hold that key during the boot up process to enter BIOS Restart your computer During the boot process you will see on the screen to press a certain key to enter setup usually the Delete or the F2 key Press and hold that key during the boot up process to enter BIOS the using arrow key scroll down to advanced bios features press enter change your first boot device to cd,press escape then press f10 to save to cmos to restart note this will erase you operating system you will have to have an operating system disk to load it onto you hard drive or create a partition to load another operating system (note after you have loaded the operating system you should go back and change the first boot device to your failsafe or optimized defaults) after windows has loaded your computer will automatically restart it might restart 2 times one to finish the installation the next will be because the operating system is loaded and will boot from your cd during the boot process you will see on the screen to press a certain key to enter setup Press and hold that key during the boot up process to enter BIOS using the arrow keys load failsafe defaults or load optimized defaults press escape then press f10 to save to cmos to restart otherwise it will keep booting from the cd /dvd drive

If the cd rom is not being detected ?

Click start control panel administration tools computer management device manager scroll down cd-dvd rom drives you might see a yellow question /exclamation mark ? ! or a red X right click to update driver You might have to physically unplug the leads for this cd/dvd computer then plug them back in restart your this should activate the found new hardware wizard. If this does not fix the problem it might be a registry problem "you only need to do the following" if you cant see your disk drive in windows explorer Close all open programs Click on Start, Run, and type regedit and press Enter Click on the plus signs (+) next to the following folders HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Control Class {4D36E965-E325-11CE-BFC1-08002BE10318} This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand column. Upper Filters Lower Filters Upper Filters.bak Lower Filters.bak If any of the above keys shown in step 4 are listed, right-click on them and choose Delete

After deleting the keys, close the registry editor
Reboot your computer
Open My Computer and check to see if your CD or DVD drives have returned. You may also want to open Device Manager and verify that the yellow exclamation and error code on the CD or DVD drive is gone.

Feb 28, 2013 | Computers & Internet

1 Answer

how to reset bios?


Restart your computer

During the boot process you will see on the screen to press a certain key to enter setup usually the Delete or F2 key
this will vary depending on your computer and operating system

Press and hold that key during the boot up process to enter BIOS using the arrow keys load failsafe defaults or load optimized defaults press escape then press f10 to save to cmos to restart

this will set the boot order

hope this helps

if this fails you might try some of these



Acer: - Ctrl+Alt+Esc

ALR PC: (F2) or (Ctrl)(Alt)Esc)

AMI BIOS: (Del), (F1) or (F2)

AST, Advantage, Award, Tandon: - Ctrl + Alt + Esc

Award BIOS: (Del) or (Ctrl)(Alt)(Esc)

Aug 01, 2012 | Asrock G41MVS3 Motherboard

1 Answer

Acer Aspire one D250. Upon starting up it says: windows root sys32.hll.dl is missing or corrupt, please install this file. Then when I hit enter it says: disk error has occurred press ctrl alt del to restart. Doing that brings it back to the disk error black screen again, help please.


Your Windows installation has become corrupted.

You need to repair the Windows Installation with the aid of the Original Windows Disk. It is a tricky business, a computer technician will be able to do it for you if you get stuck.

Thanks
damnor01

Apr 13, 2011 | Intel Computers & Internet

1 Answer

i have a problem on this cod c000021a fatal system error i have window when i shut down my computer show blue screen with this cod c000021a fatal system error and computer restarts i need help for solve this problem


Blue Screen system error. If you've been running windows Xp, please do the following:
1. Insert Windows XP CD in the Pc.
2. Restart the PC and while in Bios, go to Boot Priority and select Boot from CD as your first priority.
3. Save and exit.
4. The PC restarts and follow the instructions on the screen. (Press any key to boot from the CD).
5.After system has finished, such will happen <Enter-To Continue R-Repair ESC-Cancel>.
6. Choose R to repair.
7. A black screen pops up, just read and type 1 and wait for the next step (password).
8. Put in your Admin Password or press "Enter".
9. Then type CHKDSK and press "Enter".
10. the system will repair the errors within the HDD and windows and later restart the PC. Good luck

Jun 21, 2010 | Dell Inspiron 1501 Notebook

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