When the file is missing or corrupt hal.dll Windows can not boot or you enter it. It is critical to get the operating system starts element. In such cases fail with a message like these occurs:
Windows could not start because the following file is missing or corrupt:
<windows root> \ system32 \ hal.dll.
Reinstall a copy of the above file.
Because Windows Could not start the following file is missing or corrupt:
<windows root> \ system32 \ hal.dll.
Please re-install a copy of the above file.
This error can occur on various versions of Windows. The solutions are different depending on the case. Click here to repair hal.dll in Windows XP. Or keep reading if the failure occurred in a more modern Windows ...
Correct the error in Windows 7, Windows 8 or 8.1
Perhaps you can search the Internet occurred DLL fails and replace yours. DO NOT. You can find reasons NOT to download the DLL files from the Internet. The most effective and safe solutions that are going to explain now. Try them in the order they are.
First of all
If you need the files on your disk or you worried about losing your attempts to recover data from the hard drive before anything. They will be safe now.
Does Windows is booting from where it should?
Upgrade the boot code
A common cause of this error is that which has changed must have these Windows. Among the reasons are "cleaning" of the PC, viruses or programs that somehow modify system files. Also remaining remnants of a previous installation of XP. Follow this link to update the boot code to BOOTMGR. Overall solves these and other cases.
There are two normal cases ...
When you're trying to boot from the hard drive
Check that you have no CD in the CD / DVD. Also there is no flash drives or USB drives attached. Then restart the PC. If this error is solved it is best to configure the boot sequence of your computer to start from the hard disk where Windows is installed. And NO from other units such as CD or USB.
If you want to boot Windows from CD or USB
Your PC must be properly configured to boot from CD or USB. See how that link. After restart.
If the error persists, there are several possibilities. A common is that you recorded bad Windows in those units. Click to see how to create a CD / USB boot Windows the best and easiest way. Other possibilities are the separate CD / USB is damaged (you'd have to try others), or the Windows you've recorded in them is not good (you'd have to get another)
Detects and repairs damaged Windows files
The easiest way is to use the Windows tool Sfc / scannow. In the page that link leads to follow the steps for that if Windows does not work. They are at the end.
Make an automatic repair of Windows
The so-called startup repair costs a little more than before, especially in Windows 7 but may be the solution if Sfc / scannow has failed to repair the Windows files. By clicking on the appropriate link according to your version:
Startup Repair for Windows 7
Repair Windows 8 will automatically
Auto Repair Windows 8.1
Note:
In those links I explain other ways to repair beyond the repair Windows startup. For now stick to that. If that does not work you go back and try the next solution.
Check the RAM
Sometimes the hal.dll error is not due to a problem with the file itself. It is a symptom of a problem with the RAM of the PC. Follow the link to test the memory of your computer.
Repair damaged hard disk parts
You can resolve the error if it is because the disc is damaged a "fixable" mode. Use chkdsk to repair your hard drive and automatically detect defective parts that may be in it (follow the instructions for when Windows does not work, that is your case).
Verify that the PC is virus
Create a USB rescue to be cleaned. No matter you do not have an antivirus installed before. Will install one in the USB. With it detect and remove any viruses from your computer.
Returns the BIOS to its default settings
Do this:
Enter the BIOS.
The option to restore the default values usually in the Exit BIOS Setup category. In general it will be an option with a similar or Load Setup Defaults Load Fail-Safe Defaults name (note that the name may be different or the option is elsewhere in the BIOS).
Exit the BIOS, saving the changes. Turn off your PC at all. Then on again.
Check the hard disk connections
It is unusual that this error is caused by damaged or improperly connected cables. But it is not impossible and worth testing.
Find the manufacturer and model of your motherboard.
Google then searches the official website of the manufacturer of your motherboard and download the instruction manual for your model.
The manual explains how to connect the hard disk to the plate. There are two types of cables to check. On one hand the data connecting the drive to the motherboard itself. On the other hand the power cord that connects to the power supply or power. Both should be well connected. If they are maybe some of those wires has been damaged. Try others if possible.
Reinstall Windows from scratch (or almost)
To prevent you from losing your stuff should you try to recover your files BEFORE following the steps in that link. Make clean or custom installation only after. Click where appropriate:
Install Windows 7 step by step
Restore or reset Windows 8
Restore or reset Windows 8.1
Repair or replace the hard disk or hardware
At this point it is most likely that your PC has a physical problem with the hard drive or other hardware. Take it to a repair center. It should be easy to repair yourself if none of the above has worked.