The following boot-start or system-start driver(s) failed to load: black

Problem
System hangs with leaving below description in Event Viewer.
"The following boot-start or system-start driver(s) failed to load:  black"

Solution 

Could not understand the rootcause of the problem.  But we can stop this by setting  below registry key value to 4


HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Black

Choose the Start DWORD and set the value to 4

How to find filetype in windows

There is a utility called "file" in unix which determines filetype  of a file. There is no default similar utility available in windows.  After trying few utilities available online, I found this one more helpful.

http://home.fnal.gov/~jklemenc/dl/filetype.zip

Find more description about the tool at http://home.fnal.gov/~jklemenc/filetype.html

I have posted screenshot of an example

C:\Documents and Settings\tig\Desktop>filetype.exe
FileType.exe
  by: Joe Klemencic
  Copyright 2004
 Usage:
   FILETYPE.EXE -i [-r] [-o

] [-v] [-?]
                 -i - Inspect a single file or all files in a directory
                -r  - Rename the file with the correct extension (-o ignored)
                -o  - Output path for file copies (creates if not exist)
                -v  - Verbose output
                -?  - This help text
  C:\Documents and Settings\tig\Desktop>filetype.exe -i  "Reach Out-participants.pdf"
Reach Out-participants.pdf (.pdf) "Adobe PDF File"
 C:\Documents and Settings\tig\Desktop>filetype.exe -i  "Perl One Liners.htm"
Perl One Liners.htm (.txt) "Text file"
 C:\Documents and Settings\tig\Desktop>filetype.exe -i  SyncToySetupPackage_v21_x86.exe
SyncToySetupPackage_v21_x86.exe (.exe) "Executable File"
 C:\Documents and Settings\tig\Desktop>filetype.exe -i  toolsmanual.dvi
Could not identify toolsmanual.dvi, skipping....
 C:\Documents and Settings\tig\Desktop>filetype.exe -i  quickCooking.do
quickCooking.do (.pdf) "Adobe PDF File"