Hi,
your system may not be configured to produce them:
Open the run application.
Type sysdm.cpl in the run box and click ok.
Look across the top of the system properties box for 'Advanced' and click that.
Look for 'Startup and Recovery' near the bottom and click 'settings'.
Near the bottom you'll see a drop down menu under the heading 'write debugging information'.
In the drop down menu choose ' small memory dump (256KB)'
Under 'small dump directory' make sure it says %SystemRoot%\Minidump.
Click ok and your good to go.
You will need to bsod again before a dump file will be created.
File scans
Your system sounds like it may have some corrupted files
Find command prompt, right click on it and run as administrator. Type...