How To

Some short and handy how tos.

How to make the system notification tray area wider on Windows 10?
This can’t be made with normal settings. But you can make all the icons visible by the simple drag and drop action. Drag and drop the icons from the pop-up part of the tray to the visible tray area.

How to convert multiple mkv video files in a folder with a batch file on Windows 10?
I needed it with little quality loss, with rescaling to 16:9 resolution, with small but ok mp3 audio and also with burned in subtitles (from the source mkv itself).
You need to install ffmpeg then copy ffmpeg.exe in the movies source. Create a bat file there (edit the destination folder) as the script below:

FOR /F "tokens=*" %%G IN ('dir /b *.mkv') DO ffmpeg -i "%%G" -c:v libx264 -preset veryfast -crf 20 -c:a mp3 -af "aformat=sample_fmts=s16" -ar 44100 -b:a 160k -vf "scale=1280:720,setdar=16/9,subtitles='%%G' :si=0" "e:\ST\1\%%G"

How to delete the old Windows 10 folders that won’t delete with normal delete?
After making a fresh Windows 10 installation the old users and Windows.old folders can’t be removed with normal delete action in explorer, even as administrator. This happens mainly due to inherited credentials of owners of the old installation. To some extend the cleanmgr tool helps.
I use these steps and a bat file: rename the folder in order to make sure it is not locked (restart maybe needed), then use the script below to take ownership and give yourself rights to it, and then delete.

takeown /F "ProgramData_" /A /R /D Y
icacls "ProgramData_" /T /grant yourUserName:F
rd /s /q "ProgramData_"

How to configure Eclipse with PyDev, Python and Plotly (Graphs) on Windows 10?
You need to have all on the same bits. Windows 10 on 64bits then also Eclipse and Java.
You can get old Eclipse installations from: https://www.eclipse.org/downloads/packages/release
Get old Java installations (without login to java oracle sign-on): https://www.oracle.com/java/technologies/javase-jdk16-downloads.html and use right-click.
Add JAVAHOME to PATH. JAVAHOME=path to java bin.
Drag and drop https://marketplace.eclipse.org/content/pydev-python-ide-eclipse into Eclipse.
Install Python: https://www.python.org/downloads/ and add to PATH to Python and Python Scripts.
Install plotly, numby, pandas with the Python Scripts command: pip install plotly
Revise: Project -> Properties -> PYTHONPATH and Preferences -> PyDev -> Interpreters -> Python Interpreters (correct location and plotly, etc. versions).