There still may be some dirty sectors on the disc so we need to run check disk again:
Dakeyras has a nice little tutorial on it here
Follow the tutorial until it boots back up, do not go on to Command Line Mode:Step 2.
>> Control Panel
>> Performance and Maintenance
>> Administrative Tools
>> Event Viewer
The Event Viewer will open up, click on Applications
>> look for the Winlogon
entry and click on it
Click the clipboard copy button
on the upper right.
Paste this into your next reply.Step 3.
Update and run MS Security Essentials again.Please report back on whether it finishes or if you get the identical BSOD