Ok thanks.  Here's what I got:

C:\Users\Anshul\Downloads\Python>conda info --envs
# conda environments:
#
python2.7.10             C:\Anaconda3\envs\python2.7.10
root                  *  C:\Anaconda3


C:\Users\Anshul\Downloads\Python>python -V
Python 3.5.0 :: Anaconda 2.4.0 (64-bit)

C:\Users\Anshul\Downloads\Python>python nullcheck.py
Checking: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts
('tahoma.ttf\x000\x000\x00\x00\x00', 1) Tahoma (TrueType)
('verdref.ttf\x000\x000\x00PA\x00\x00\x00\x00', 1) Verdana Ref (TrueType)
('grgaref.ttf\x000\x000\x00PA\x00\x00\x00\x00', 1) Georgia Ref (TrueType)
('refspec.ttf\x000\x000\x00PA\x10\x00%APP', 1) RefSpecialty (TrueType)
Cannot open: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Fonts
done

C:\Users\Anshul\Downloads\Python>activate python2.7.10
Activating environment "C:\Anaconda3\envs\python2.7.10"...

[python2.7] C:\Users\Anshul\Downloads\Python>python -V
Python 2.7.10 :: Continuum Analytics, Inc.

[python2.7] C:\Users\Anshul\Downloads\Python>python nullcheck.py
Traceback (most recent call last):
  File "nullcheck.py", line 3, in <module>
    import winreg
ImportError: No module named winreg

[python2.7] C:\Users\Anshul\Downloads\Python>