It's a Windows core process and will not cause a BSOD, unless it has been altered, corrupted or in some way changed. Unless I am mistaken it is the process that starts many of the Windows background processes that run in the background with Windows, among other things.
Stop code F4 in my experience is usually a hard drive, although there are several other things that can cause it, like Anti Virus, bad drivers and some software, even ram. Yours has been fairly consistent a code F4.
Microsoft Security essentials has never been know to cause a BSOD that I have ever seen.
If you would like to try and see if there is an obvious driver that is causing it. Create a manual restore point before doing anything else. It may be your only way back. The link of how to do it is below. Make sure you have the installation disk, just in case. When setting it up, sort the drivers by provider, and enable all drivers not provided by Microsoft. Don't enable any drivers from Microsoft.
Driver Verifier - Enable and Disable
Run Driver Verifier for 24 hours or the occurrence of the next crash, whichever is earlier.
Information
What is Driver Verifier:
It puts stress on the drivers, and tries to make the faulty driver crash the computer. It is designed this way, to attempt to trap the offending driver.
What you will notice:
It will tend to make the computer rather slow and sluggish because the drivers are being stressed.
Let us know the results, with the subsequent crash dumps, if any
.