How to fix Hal.dll missing in windows

Hal.dll missing displays in different ways.Those are

• C:\Windows\system32\hal.dll.
  Please re-install a copy of the above file."
  
• "Cannot find \Windows\System32\hal.dll"
  
• "C:\Windows\System32\Hal.dll missing or corrupt:
  Please re-install a copy of the above file."

those are the common ways which I have seen.

How to fix

try to restart the PC ..some times it automatically 

correct.So no need to worry.Bt unfortunately i not 

happens check the BIOS is configured so the boot 

order first lists a hard drive other than the one with 

your usually-used copy of Windows installed on it, 

that might be the problem.If there is a corruption of 

the hal.dll when we do a start up repair,it will 

fix.otherwise update the volume boot code to use 

BOOTMGR. If the volume boot code has corrupted or 

is configured for a boot manager other than 

BOOTMGR then you might see a hal.dll is missing 

error. An issue with the volume boot code is the most 

common cause of hal.dll errors in Windows 7, 8, or 

Vista. The reason I list it as the fourth troubleshooting 

step is because the first three are so simple to try. 

However, if you're comfortable working with advanced 

tools in Windows, feel free to give this one a shot 

first.Also check your Hard disk is not corrupted and 

works well.If these efforts in vain,No use to try to fix 

these ways.Format your hard disk and do a fresh 

windows install

Always be happy with error free