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TURN POWER OFF AND UNPLUG (REMOVE BATTERY ON LAPTOP) BEFORE PROCEDING
In all likely hood you have a memory issue. If this is a desktop computer open the case and check the memory to ensure it is correctly seated. If the issue continues and you have two memory chips, pull one, check the computer, if it still fails swap the two chips and test again.
If it is a laptop you will need to open the memory door (usually on the bottom of the laptop held in place by a small screw), and try the same procedures.
If this does not solve the problem (on a desktop only) pull all memory, unplug all drives, remove all expantion cards, and power up the computer. You should now get like 3 beeps. Put the memory back in first (and video card if not intergrated). If the computer now gives a hard drive error, reconect the hard drive and power back up. If the computer boots up, plug back in one item at a time and see if you get the issue, what ever item is bad will cause the computer to start the beeping.
ENSURE YOU ARE POWERING THE COMPUTER OFF BETWEEN EACH OF THE ABOVE STEPS.
The simple soltion to this problem would normally be to open the side panel of your computer chassis and check that all connections to and from the hard drive are making good contact. Push the connectors in gently including the power connector and the data connectors on the mainboard. Now boot up your computer system.
If the problem persists then you may need to do the following:
Enter the BIOS by tapping the Delete key during first powering on the computer. Now ensure that the main hard drive, known as the Master boot device is set to 1st in the boot priority menu.
Hopefully it's just a loose connection. A more serious explaination for this occurrence is that the hard drive has failed. In other words it has died/faulty and is therefore not working with your computer.
are u able to boot in safe mode?------>on power on keep tapping F8 key.u can select safe mode and press enter->login to adminsitrator mode(password can be blank).if u are able to login to safe mode then itz an issue with ur OS(win xp or win vista or win7 whichever is installed on ur pc).If u are unable to login to safe mode please let me know
Power down completely and then remove the memory stick. Wait a full 30 to 60 seconds with power off. Power up to start boot process. Pay attention to the screen while booting to note any messages during this time. If the computer fails to boot still - check the drives (floppy, CD and DVD) to be sure none have disks inside - remove any if found. Attempt a warm reboot if possible - otherwise perform a cold / hardware reboot.
If still not booting, access the computer's BIOS and make sure the information on those pages are correct. If in doubt, set any unknown values to "default" or auto detect. Be sure that the bootable hard disk appears in the boot order somewhere - if not the set as the first bootable device.
Once booting successfully into the OS, insert the memory stick and attempt to read the contents. Many applications that ship on memory cards are not bootable - but yours may. Read the info supplied wit the memory card fully to be sure.
If unable to boot the computer, provide the manufacturer's name, model and your OS. Also include the name of the application on the memory card.
Hopefully, you'll have gotten the computer started before needing to write back with more info. I hope his was helpful - and good luck!
If you boot into safe mode* and have same problem, you might be missing a file called "userinit.exe." It's located in the /WINDOWS/SYSTEM32 subdirectory. You can copy it from another xp computer (suggest matching updated pro vs home files). Use your harddrive as a slave on another computer if necessary.
*safe mode: Restart your computer and start pressing the F8 key on your keyboard during boot up.
Then you gotta ask: how did that file get deleted? It's a popular file to attack by malware authors and some anti-virus software will delete it as part of an infection cleansing.
Try booting into Safe Mode. You can do this by rebooting your computer. As soon as it turns on, you should see some kind of splash screen or logo like "Acer" or "Dell". When you see this, start tapping the F8 key about twice each second. Hopefully, you'll get the Boot menu for Windows. Select "Safe mode" from the list and see if it boots properly. If it does, then you have a software issue like a virus, bad drivers, or faulty software installed. If it won't boot into Safe Mode, you may have a compromised operating system or failing hard drive. Give that a try and see what happens.
To turn the Welcome screen on or off
You must have a computer administrator
account on a computer that is a member of a workgroup or is a stand-alone
computer to turn on or turn off the Use the Welcome screen feature.
Logging on at the Welcome screen is not available on computers that are members of a
To specify that users log on to the computer using the Welcome screen, select the Use
the Welcome screen check box.
A user logs on to the computer by clicking his or her user account name on
the Welcome screen. If a password
is assigned to the account, the user is prompted to type it.
To specify that users log on to the computer without using the Welcome screen, clear the Use
the Welcome screen check box.
screen will no
longer appear when you start the computer. To log on to the computer, type your
user name (and password, if you have one) in the standard Log On to
Windows dialog box.
To open User Accounts, click Start, click Control
Panel, and then click User Accounts.
Fast User Switching is available only when the Welcome screen is turned on.
For more information, click Related Topics.
I hope this helps. Please let me know if you require further assistance.
Thank you very much for the quick follow up. I am very sorry that I couldn't update the issue on time as I was very busy on my work.
My problem was solved even I am not sure what was happened to me. As I wrote down before, I left my computer disconnected to all power cable (power supply cable and monitor cable) on Nov. 18 at 5 am. This afternoon I connected monitor's power cable and main AC power cable, and turned on main AC power; then the bios check and memory check had appeared on the screen, and also asked for resetting the COMS. After I have reset all parameters, the computer is boot up as before and had the Windows Advance Options Menu (I didn't hit F8). I chose boot as "last knowing ...", after I had the desktop, then I went to Control Panel ... > to switch off the Screen Saver. Now everything is fine. I don't know if the length of the time of the disconnected power was the key point. Until now, I still do not know what is the correct scenario (the exact step by step) of clear COMS. I checked with websites, seems like there are so many different ways to do it (more than four ways). Does this mean every way is correct or can I say COMS can be cleared in any way? Thank you again,