Before:


After:


Step 1:
First download the required batch script and files from following link:

Download Windows 10 Taskbar Context Menu Tweaker. After downloading the ZIP file, extract the contents and you'll get 2 folders: 32-bit (x86) & 64-bit (x64).

Step 2:
Some people might receive "DLL file couldn't be found" error message while running the file. It happens because this program was developed in C++ using Visual Studio 2015, that's why it also requires installation of "Visual C++ Redistributable Package" in your computer to install required run-time components of Visual C++ libraries. You can install it from following direct download links:
Download Visual C++ Redistributable (for 64-bit or x64)
Download Visual C++ Redistributable (for 32-bit or x86)

Step 3:
Open the appropriate folder in "Windows 10 Taskbar Context Menu Tweaker" for your Windows 10 edition and run Load_xx.bat file. It'll immediately disable dark context menu and will bring back classic and small context menu in Windows 10 Taskbar.
If you want to restore default dark and huge context menu in Taskbar, you can run Unload_xx.bat file which will restore default modern context menu in Taskbar.

Step 4:
This tweak will only work for current session. If you restart your computer or restart Windows Explorer, you'll need to re-run the BAT file. To overcome this issue, you can add a shortcut of the BAT file in Windows startup. To add the program shortcut to startup, do the following:

Copy and paste following path in RUN dialog box and press Enter:
shell:startup

It'll open Startup folder which usually contains program shortcuts which are set to automatically start with Windows. Now paste (depending on your architecture) Load_x64.bat and TaskBarMenuTweaker_x64.dll here and you are done.
Information
Credit to MDJ from MSFN StartIsBack forum for posting about this and AskVG for the article: https://www.askvg.com/tip-get-rid-of-...ws-10-taskbar/