The trouble with flashing is that most do follow safety precautions.

You problem is easy to resolve:

1) Your anti-virus is preventing the flashing

2) Hold down F8 when your computer starts and flash in safe mode

  Donate RM1 or more to charity for money saved from repairs if sent to phone shop!

1) You are a very lucky person until now. From your error report, this is a security kernel error. What is the meaning of security kernel? A kernel is a bridge layer between applications and operating systems. So your security kernel error is a security error response to the compatibility of your flash program with the operating system.

You dont need to install any antivirus program to get this type of errors because Microsoft by default have the Microsoft Security Center which also includes basic antivirus and firewall.
You have flashed countless times, tell me something. Is you PC system the same without any new installation of applications, upgrades or updates of any sorts until today? If the answer is no, then there is no point in stating that you have flashed countless of times. 
2) Flashing under safe mode. This will 100% work if your flash program is compatible with the version of  Windows that you are using now. By stating Windows version, I also mean that in the event an operating system have been updated with fixes, the Windows OS may not be compatible anymore.
Do not forget the donation! 

Congrats to you.  Actually, there is a very safe method of how to install any incompatible program in Win8 and run in whatever conditions without errors and prevent damage your system if your system hangs in the normal mode. I should not be telling everything since there is no donation to charity.
Bear in mind that all Windows OS default installation comes with basic antivirus and firewall in the Internet Explorer package so is not the Microsoft Security Essential that may have caused security kernel errors. Microsoft Security Essential or The Microsoft Security Center are only the control layers depending on which OS you have but the critical security components are still present and cannot be uninstalled by a layman unless it is done by an expert in editing/modifying the registry.