ERROR: Kernel busy (Cell move forward without execution)

**System:** 3.6.5 | Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 64 bit (AMD64)] on Windows 10.

**Notebook Installation details:** Anaconda version 5.2.0 (64 bit).

**What are some problem details?**
In the notebook, the default kernel _ipykernel_ (at /ipykernel/resources) is showing busy (_kernel busy_). Python scripts are not running on it, and instead of showing anything the cell moves forward to new cell. The problem remains same whether notebook started from anaconda-navigator or using command prompt (cmd-windows) as `jupyter notebook` showing-

> [I 23:34:53.660 NotebookApp] JupyterLab application directory is C:\Users\HP\Anaconda3\share\jupyter\lab
> [I 23:34:53.815 NotebookApp] Serving notebooks from local directory: C:\Users\HP
> [I 23:34:53.816 NotebookApp] 0 active kernels
> [I 23:34:53.817 NotebookApp] The Jupyter Notebook is running at:
> [I 23:34:53.817 NotebookApp] http://localhost:8888/?token=0b76b73e45b5bb884d872e0481e94ea45d4ad074a6cb539f
> [I 23:34:53.817 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
> [C 23:34:53.823 NotebookApp]
>
> Copy/paste this URL into your browser when you connect for the first time,
> to login with a token:
> http://localhost:8888/?token=0b76b73e45b5bb884d872e0481e94ea45d4ad074a6cb539f&token=0b76b73e45b5bb884d872e0481e94ea45d4ad074a6cb539f

Notice that third line showing 0 active kernels.

A screenshot of running jupyter notebook is
.

This problem looks similar to #3612 and #3724.

**More details**

Output of `jupyter kernelspec list` (It was showing python3 kernel when we tried installing python3 kernel, and it didn't work).

> Available kernels:
> python3 C:\Users/HP/.local/Library/python3.6/site-packages/ipykernel/resources

Here is the output of `jupyter troubleshoot`:

> $PATH:
> C:\ProgramData\Oracle\Java\javapath
> C:\Windows\system32
> C:\Windows
> C:\Windows\System32\Wbem
> C:\Windows\System32\WindowsPowerShell\v1.0\
> C:\Program Files (x86)\MySQL\MySQL Server 5.5\bin
> C:\Users\HP\AppData\Local\GitHubDesktop\bin
> C:\adb
> C:\Program Files\Git\cmd
> C:\WINDOWS\system32
> C:\WINDOWS
> C:\WINDOWS\System32\Wbem
> C:\WINDOWS\System32\WindowsPowerShell\v1.0\
> C:\WINDOWS\System32\OpenSSH\
> E:\Microprocessor\GTK\GTK2-Runtime\lib
> C:\Program Files\Microsoft VS Code\bin
> C:\Users\HP\Anaconda3
> C:\Users\HP\Anaconda3\Library\mingw-w64\bin
> C:\Users\HP\Anaconda3\Library\usr\bin
> C:\Users\HP\Anaconda3\Library\bin
> C:\Users\HP\Anaconda3\Scripts
> C:\Users\HP\AppData\Local\GitHubDesktop\bin
> C:\Users\HP\AppData\Local\Microsoft\WindowsApps
>
> sys.path:
> C:\Users\HP\Anaconda3\Scripts
> C:\Users\HP\Anaconda3\python36.zip
> C:\Users\HP\Anaconda3\DLLs
> C:\Users\HP\Anaconda3\lib
> C:\Users\HP\Anaconda3
> C:\Users\HP\Anaconda3\lib\site-packages
> C:\Users\HP\Anaconda3\lib\site-packages\win32
> C:\Users\HP\Anaconda3\lib\site-packages\win32\lib
> C:\Users\HP\Anaconda3\lib\site-packages\Pythonwin
>
> sys.executable:
> C:\Users\HP\Anaconda3\python.exe
>
> sys.version:
> 3.6.5 |Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 64 bit (AMD64)]
>
> platform.platform():
> Windows-10-10.0.17134-SP0
>
> where jupyter:
> C:\Users\HP\Anaconda3\Scripts\jupyter.exe
>
> pip list:
> Package Version
> ---------------------------------- ---------
> absl-py 0.3.0
> alabaster 0.7.10
> anaconda-client 1.6.14
> anaconda-navigator 1.8.7
> anaconda-project 0.8.2
> asn1crypto 0.24.0
> astor 0.7.1
> astroid 1.6.3
> astropy 3.0.2
> attrs 18.1.0
> Babel 2.5.3
> backcall 0.1.0
> backports.shutil-get-terminal-size 1.0.0
> beautifulsoup4 4.6.0
> bitarray 0.8.1
> bkcharts 0.2
> blaze 0.11.3
> bleach 2.1.3
> bokeh 0.12.16
> boto 2.48.0
> Bottleneck 1.2.1
> certifi 2018.4.16
> cffi 1.11.5
> chardet 3.0.4
> click 6.7
> cloudpickle 0.5.3
> clyent 1.2.2
> colorama 0.3.9
> comtypes 1.1.4
> conda 4.5.4
> conda-build 3.10.5
> conda-verify 2.0.0
> contextlib2 0.5.5
> cryptography 2.2.2
> cycler 0.10.0
> Cython 0.28.2
> cytoolz 0.9.0.1
> dask 0.17.5
> datashape 0.5.4
> decorator 4.3.0
> distributed 1.21.8
> docutils 0.14
> entrypoints 0.2.3
> et-xmlfile 1.0.1
> fastcache 1.0.2
> filelock 3.0.4
> Flask 1.0.2
> Flask-Cors 3.0.4
> gast 0.2.0
> gevent 1.3.0
> glob2 0.6
> greenlet 0.4.13
> grpcio 1.14.1
> h5py 2.7.1
> heapdict 1.0.0
> html5lib 1.0.1
> idna 2.6
> imageio 2.3.0
> imagesize 1.0.0
> ipykernel 4.8.2
> ipython 6.4.0
> ipython-genutils 0.2.0
> ipywidgets 7.2.1
> isort 4.3.4
> itsdangerous 0.24
> jdcal 1.4
> jedi 0.12.0
> Jinja2 2.10
> jsonschema 2.6.0
> jupyter 1.0.0
> jupyter-client 5.2.3
> jupyter-console 5.2.0
> jupyter-core 4.4.0
> jupyterlab 0.32.1
> jupyterlab-launcher 0.10.5
> kiwisolver 1.0.1
> lazy-object-proxy 1.3.1
> llvmlite 0.23.1
> locket 0.2.0
> lxml 4.2.1
> Markdown 2.6.11
> MarkupSafe 1.0
> matplotlib 2.2.2
> mccabe 0.6.1
> menuinst 1.4.14
> mistune 0.8.3
> mkl-fft 1.0.0
> mkl-random 1.0.1
> more-itertools 4.1.0
> mpmath 1.0.0
> msgpack-python 0.5.6
> multipledispatch 0.5.0
> navigator-updater 0.2.1
> nbconvert 5.3.1
> nbformat 4.4.0
> networkx 2.1
> nltk 3.3
> nose 1.3.7
> notebook 5.5.0
> numba 0.38.0
> numexpr 2.6.5
> numpy 1.14.3
> numpydoc 0.8.0
> odo 0.5.1
> olefile 0.45.1
> openpyxl 2.5.3
> packaging 17.1
> pandas 0.23.0
> pandocfilters 1.4.2
> parso 0.2.0
> partd 0.3.8
> path.py 11.0.1
> pathlib2 2.3.2
> patsy 0.5.0
> pep8 1.7.1
> pickleshare 0.7.4
> Pillow 5.1.0
> pip 18.0
> pkginfo 1.4.2
> pluggy 0.6.0
> ply 3.11
> prompt-toolkit 1.0.15
> protobuf 3.6.0
> psutil 5.4.5
> py 1.5.3
> pycodestyle 2.4.0
> pycosat 0.6.3
> pycparser 2.18
> pycrypto 2.6.1
> pycurl 7.43.0.1
> pyflakes 1.6.0
> Pygments 2.2.0
> pylint 1.8.4
> pyodbc 4.0.23
> pyOpenSSL 18.0.0
> pyparsing 2.2.0
> PySocks 1.6.8
> pytest 3.5.1
> pytest-arraydiff 0.2
> pytest-astropy 0.3.0
> pytest-doctestplus 0.1.3
> pytest-openfiles 0.3.0
> pytest-remotedata 0.2.1
> python-dateutil 2.7.3
> pytz 2018.4
> PyWavelets 0.5.2
> pywin32 223
> pywinpty 0.5.1
> PyYAML 3.12
> pyzmq 17.0.0
> QtAwesome 0.4.4
> qtconsole 4.3.1
> QtPy 1.4.1
> requests 2.18.4
> rope 0.10.7
> ruamel-yaml 0.15.35
> scikit-image 0.13.1
> scikit-learn 0.19.1
> scipy 1.1.0
> seaborn 0.8.1
> Send2Trash 1.5.0
> setuptools 39.1.0
> simplegeneric 0.8.1
> singledispatch 3.4.0.3
> six 1.11.0
> sklearn 0.0
> snowballstemmer 1.2.1
> sortedcollections 0.6.1
> sortedcontainers 1.5.10
> Sphinx 1.7.4
> sphinxcontrib-websupport 1.0.1
> spyder 3.2.8
> SQLAlchemy 1.2.7
> statsmodels 0.9.0
> sympy 1.1.1
> tables 3.4.3
> tblib 1.3.2
> tensorboard 1.10.0
> tensorflow 1.10.0
> termcolor 1.1.0
> terminado 0.8.1
> testpath 0.3.1
> toolz 0.9.0
> tornado 5.0.2
> traitlets 4.3.2
> typing 3.6.4
> unicodecsv 0.14.1
> urllib3 1.22
> wcwidth 0.1.7
> webencodings 0.5.1
> Werkzeug 0.14.1
> wheel 0.31.1
> widgetsnbextension 3.2.1
> win-inet-pton 1.0.1
> win-unicode-console 0.5
> wincertstore 0.2
> wrapt 1.10.11
> xlrd 1.1.0
> XlsxWriter 1.0.4
> xlwings 0.11.8
> xlwt 1.3.0
> zict 0.1.3
>
> conda list:
> # packages in environment at C:\Users\HP\Anaconda3:
> #
> # Name Version Build Channel
> _ipyw_jlab_nb_ext_conf 0.1.0 py36he6757f0_0
> absl-py 0.3.0
> alabaster 0.7.10 py36hcd07829_0
> anaconda 5.2.0 py36_3
> anaconda-client 1.6.14 py36_0
> anaconda-navigator 1.8.7 py36_0
> anaconda-project 0.8.2 py36hfad2e28_0
> asn1crypto 0.24.0 py36_0
> astor 0.7.1
> astroid 1.6.3 py36_0
> astropy 3.0.2 py36h452e1ab_1
> attrs 18.1.0 py36_0
> babel 2.5.3 py36_0
> backcall 0.1.0 py36_0
> backports 1.0 py36h81696a8_1
> backports.shutil_get_terminal_size 1.0.0 py36h79ab834_2
> beautifulsoup4 4.6.0 py36hd4cc5e8_1
> bitarray 0.8.1 py36hfa6e2cd_1
> bkcharts 0.2 py36h7e685f7_0
> blas 1.0 mkl
> blaze 0.11.3 py36h8a29ca5_0
> bleach 2.1.3 py36_0
> blosc 1.14.3 he51fdeb_0
> bokeh 0.12.16 py36_0
> boto 2.48.0 py36h1a776d2_1
> bottleneck 1.2.1 py36hd119dfa_0
> bzip2 1.0.6 hfa6e2cd_5
> ca-certificates 2018.03.07 0
> certifi 2018.4.16 py36_0
> cffi 1.11.5 py36h945400d_0
> chardet 3.0.4 py36h420ce6e_1
> click 6.7 py36hec8c647_0
> cloudpickle 0.5.3 py36_0
> clyent 1.2.2 py36hb10d595_1
> colorama 0.3.9 py36h029ae33_0
> comtypes 1.1.4 py36_0
> conda 4.5.4 py36_0
> conda-build 3.10.5 py36_0
> conda-env 2.6.0 h36134e3_1
> conda-verify 2.0.0 py36h065de53_0
> console_shortcut 0.1.1 h6bb2dd7_3
> contextlib2 0.5.5 py36he5d52c0_0
> cryptography 2.2.2 py36hfa6e2cd_0
> curl 7.60.0 h7602738_0
> cycler 0.10.0 py36h009560c_0
> cython 0.28.2 py36hfa6e2cd_0
> cytoolz 0.9.0.1 py36hfa6e2cd_0
> dask 0.17.5 py36_0
> dask-core 0.17.5 py36_0
> datashape 0.5.4 py36h5770b85_0
> decorator 4.3.0 py36_0
> distributed 1.21.8 py36_0
> docutils 0.14 py36h6012d8f_0
> entrypoints 0.2.3 py36hfd66bb0_2
> et_xmlfile 1.0.1 py36h3d2d736_0
> fastcache 1.0.2 py36hfa6e2cd_2
> filelock 3.0.4 py36_0
> flask 1.0.2 py36_1
> flask-cors 3.0.4 py36_0
> freetype 2.8 h51f8f2c_1
> gast 0.2.0
> get_terminal_size 1.0.0 h38e98db_0
> gevent 1.3.0 py36hfa6e2cd_0
> glob2 0.6 py36hdf76b57_0
> greenlet 0.4.13 py36hfa6e2cd_0
> grpcio 1.14.1
> h5py 2.7.1 py36h3bdd7fb_2
> hdf5 1.10.2 hac2f561_1
> heapdict 1.0.0 py36_2
> html5lib 1.0.1 py36h047fa9f_0
> icc_rt 2017.0.4 h97af966_0
> icu 58.2 ha66f8fd_1
> idna 2.6 py36h148d497_1
> imageio 2.3.0 py36_0
> imagesize 1.0.0 py36_0
> intel-openmp 2018.0.0 8
> ipykernel 4.8.2 py36_0
> ipython 6.4.0 py36_0
> ipython_genutils 0.2.0 py36h3c5d0ee_0
> ipywidgets 7.2.1 py36_0
> isort 4.3.4 py36_0
> itsdangerous 0.24 py36hb6c5a24_1
> jdcal 1.4 py36_0
> jedi 0.12.0 py36_1
> jinja2 2.10 py36h292fed1_0
> jpeg 9b hb83a4c4_2
> jsonschema 2.6.0 py36h7636477_0
> jupyter 1.0.0 py36_4
> jupyter_client 5.2.3 py36_0
> jupyter_console 5.2.0 py36h6d89b47_1
> jupyter_core 4.4.0 py36h56e9d50_0
> jupyterlab 0.32.1 py36_0
> jupyterlab_launcher 0.10.5 py36_0
> kiwisolver 1.0.1 py36h12c3424_0
> lazy-object-proxy 1.3.1 py36hd1c21d2_0
> libcurl 7.60.0 hc4dcbb0_0
> libiconv 1.15 h1df5818_7
> libpng 1.6.34 h79bbb47_0
> libsodium 1.0.16 h9d3ae62_0
> libssh2 1.8.0 hd619d38_4
> libtiff 4.0.9 hb8ad9f9_1
> libxml2 2.9.8 hadb2253_1
> libxslt 1.1.32 hf6f1972_0
> llvmlite 0.23.1 py36hcacf6c6_0
> locket 0.2.0 py36hfed976d_1
> lxml 4.2.1 py36heafd4d3_0
> lzo 2.10 h6df0209_2
> m2w64-gcc-libgfortran 5.3.0 6
> m2w64-gcc-libs 5.3.0 7
> m2w64-gcc-libs-core 5.3.0 7
> m2w64-gmp 6.1.0 2
> m2w64-libwinpthread-git 5.0.0.4634.697f757 2
> Markdown 2.6.11
> markupsafe 1.0 py36h0e26971_1
> matplotlib 2.2.2 py36h153e9ff_1
> mccabe 0.6.1 py36hb41005a_1
> menuinst 1.4.14 py36hfa6e2cd_0
> mistune 0.8.3 py36hfa6e2cd_1
> mkl 2018.0.2 1
> mkl-service 1.1.2 py36h57e144c_4
> mkl_fft 1.0.1 py36h452e1ab_0
> mkl_random 1.0.1 py36h9258bd6_0
> more-itertools 4.1.0 py36_0
> mpmath 1.0.0 py36hacc8adf_2
> msgpack-python 0.5.6 py36he980bc4_0
> msys2-conda-epoch 20160418 1
> multipledispatch 0.5.0 py36_0
> navigator-updater 0.2.1 py36_0
> nbconvert 5.3.1 py36h8dc0fde_0
> nbformat 4.4.0 py36h3a5bc1b_0
> networkx 2.1 py36_0
> nltk 3.3.0 py36_0
> nose 1.3.7 py36h1c3779e_2
> notebook 5.5.0 py36_0
> numba 0.38.0 py36h830ac7b_0
> numexpr 2.6.5 py36hcd2f87e_0
> numpy 1.14.3 py36h9fa60d3_1
> numpy-base 1.14.3 py36h555522e_1
> numpydoc 0.8.0 py36_0
> odo 0.5.1 py36h7560279_0
> olefile 0.45.1 py36_0
> openpyxl 2.5.3 py36_0
> openssl 1.0.2o h8ea7d77_0
> packaging 17.1 py36_0
> pandas 0.23.0 py36h830ac7b_0
> pandoc 1.19.2.1 hb2460c7_1
> pandocfilters 1.4.2 py36h3ef6317_1
> parso 0.2.0 py36_0
> partd 0.3.8 py36hc8e763b_0
> path.py 11.0.1 py36_0
> pathlib2 2.3.2 py36_0
> patsy 0.5.0 py36_0
> pep8 1.7.1 py36_0
> pickleshare 0.7.4 py36h9de030f_0
> pillow 5.1.0 py36h0738816_0
> pip 10.0.1 py36_0
> pip 18.0
> pkginfo 1.4.2 py36_1
> pluggy 0.6.0 py36hc7daf1e_0
> ply 3.11 py36_0
> prompt_toolkit 1.0.15 py36h60b8f86_0
> protobuf 3.6.0
> psutil 5.4.5 py36hfa6e2cd_0
> py 1.5.3 py36_0
> pycodestyle 2.4.0 py36_0
> pycosat 0.6.3 py36h413d8a4_0
> pycparser 2.18 py36hd053e01_1
> pycrypto 2.6.1 py36hfa6e2cd_8
> pycurl 7.43.0.1 py36h74b6da3_0
> pyflakes 1.6.0 py36h0b975d6_0
> pygments 2.2.0 py36hb010967_0
> pylint 1.8.4 py36_0
> pyodbc 4.0.23 py36h6538335_0
> pyopenssl 18.0.0 py36_0
> pyparsing 2.2.0 py36h785a196_1
> pyqt 5.9.2 py36h1aa27d4_0
> pysocks 1.6.8 py36_0
> pytables 3.4.3 py36he6f6034_1
> pytest 3.5.1 py36_0
> pytest-arraydiff 0.2 py36_0
> pytest-astropy 0.3.0 py36_0
> pytest-doctestplus 0.1.3 py36_0
> pytest-openfiles 0.3.0 py36_0
> pytest-remotedata 0.2.1 py36_0
> python 3.6.5 h0c2934d_0
> python-dateutil 2.7.3 py36_0
> pytz 2018.4 py36_0
> pywavelets 0.5.2 py36hc649158_0
> pywin32 223 py36hfa6e2cd_1
> pywinpty 0.5.1 py36_0
> pyyaml 3.12 py36h1d1928f_1
> pyzmq 17.0.0 py36hfa6e2cd_1
> qt 5.9.5 vc14he4a7d60_0 [vc14]
> qtawesome 0.4.4 py36h5aa48f6_0
> qtconsole 4.3.1 py36h99a29a9_0
> qtpy 1.4.1 py36_0
> requests 2.18.4 py36h4371aae_1
> rope 0.10.7 py36had63a69_0
> ruamel_yaml 0.15.35 py36hfa6e2cd_1
> scikit-image 0.13.1 py36hfa6e2cd_1
> scikit-learn 0.19.1 py36h53aea1b_0
> scipy 1.1.0 py36h672f292_0
> seaborn 0.8.1 py36h9b69545_0
> send2trash 1.5.0 py36_0
> setuptools 39.1.0 py36_0
> simplegeneric 0.8.1 py36_2
> singledispatch 3.4.0.3 py36h17d0c80_0
> sip 4.19.8 py36h6538335_0
> six 1.11.0 py36h4db2310_1
> sklearn 0.0
> snappy 1.1.7 h777316e_3
> snowballstemmer 1.2.1 py36h763602f_0
> sortedcollections 0.6.1 py36_0
> sortedcontainers 1.5.10 py36_0
> sphinx 1.7.4 py36_0
> sphinxcontrib 1.0 py36hbbac3d2_1
> sphinxcontrib-websupport 1.0.1 py36hb5e5916_1
> spyder 3.2.8 py36_0
> spyder 2.2.0
> sqlalchemy 1.2.7 py36ha85dd04_0
> sqlite 3.23.1 h35aae40_0
> statsmodels 0.9.0 py36h452e1ab_0
> sympy 1.1.1 py36h96708e0_0
> tblib 1.3.2 py36h30f5020_0
> tensorboard 1.10.0
> tensorflow 1.10.0
> termcolor 1.1.0
> terminado 0.8.1 py36_1
> testpath 0.3.1 py36h2698cfe_0
> tk 8.6.7 hcb92d03_3
> toolz 0.9.0 py36_0
> tornado 5.0.2 py36_0
> traitlets 4.3.2 py36h096827d_0
> typing 3.6.4 py36_0
> unicodecsv 0.14.1 py36h6450c06_0
> urllib3 1.22 py36h276f60a_0
> vc 14 h0510ff6_3
> vs2015_runtime 14.0.25123 3
> wcwidth 0.1.7 py36h3d5aa90_0
> webencodings 0.5.1 py36h67c50ae_1
> werkzeug 0.14.1 py36_0
> wheel 0.31.1 py36_0
> widgetsnbextension 3.2.1 py36_0
> win_inet_pton 1.0.1 py36he67d7fd_1
> win_unicode_console 0.5 py36hcdbd4b5_0
> wincertstore 0.2 py36h7fe50ca_0
> winpty 0.4.3 4
> wrapt 1.10.11 py36he5f5981_0
> xlrd 1.1.0 py36h1cb58dc_1
> xlsxwriter 1.0.4 py36_0
> xlwings 0.11.8 py36_0
> xlwt 1.3.0 py36h1a4751e_0
> yaml 0.1.7 hc54c509_2
> zeromq 4.2.5 hc6251cf_0
> zict 0.1.3 py36h2d8e73e_0
> zlib 1.2.11 h8395fce_2

**Tried some measures:**

- Tried installing python3 kernel, but the problem persists for the same (Deleted as it does not worked at all).
- Tried disabling all the windows defenders (did not worked).
- Opening in other browser.
- Tried reinstalling several times (really and it did not worked).
- Tried all measures mentioned at [Jupyter Notebook 5.6.0 documentation.](http://jupyter-notebook.readthedocs.io/en/stable/troubleshooting.html#jupyter-doesn-t-load-or-doesn-t-work-in-the-browser)

It looks like there is a problem in system (i.e. hardware). Is it?

Start by reproducing the kernel-busy behavior on Windows with the reported Anaconda and Jupyter Notebook versions, then compare the symptoms with issues #3612 and #3724. Use the shown `jupyter kernelspec list` and `jupyter troubleshoot` outputs to investigate why no active kernel is available; done means Python cells execute normally instead of advancing without output.

Written by the indexing model from the issue text.