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Application Crash Error for application “Unity Pro”. Cause msxml3, msxml4.

Many different software are installing msxml parsers. A new software installed can replace a msxml file.
Unity Pro also does it, but if a crash of Unity Pro occurs, to check if msxml3 or / and msxml4.dll files is correctly registered is required.

How to register these files?

. To register msxml3.dll:
- Open the command prompt window selecting “run as admin”
- For a 32-bit OS, XP, W7 or W8.x, type:
%systemroot%\System32\regsvr32.exe c:\Windows\System32\msxml3.dll then enter.
- For a 64-bit OS W7 or W8.x, type:
%systemroot%\SysWoW64\regsvr32.exe c:\Windows\SysWOW64\msxml3.dll then enter.

. To register msxml4.dll:
- Open the command prompt window selecting “run as admin”
- For a 32-bit OS, XP, W7 or W8.x, type:
%systemroot%\System32\regsvr32.exe c:\Windows\System32\msxml4.dll then enter.
- For a 64-bit OS W7 or W8.x, type:
%systemroot%\SysWoW64\regsvr32.exe c:\Windows\SysWOW64\msxml4.dll then enter.
 
 
Note: In fact we have to take care because on a 64-bit version of Windows operating system, there are two versions of the Regsv32.exe file:
- The 64-bit version is %systemroot%\System32\regsvr32.exe.
- The 32-bit version is %systemroot%\SysWoW64\regsvr32.exe.
 
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