QGIS 3.10.5-1 LTR PORTABLE (COPY AND PASTE EDITION)

a. Download ZIP file from following link:
<a href="http://www.gisminer.eu/2020/QGIS/QGIS_31051_LTR_PORTABLE_C&P_EDITION/sw/QGIS_31051_LTR_PORTABLE_C&P_EDITION.zip">QGIS 3.10.5-1 LTR PORTABLE (COPY AND PASTE EDITION)</a>

b. Unzip the file onto your PC (Windows OS, 64 bit ONLY)

c. Go to "Bin" subfolder

d. Search for "batch" and choose version to run:

e. Double click and wait..