Burn CD and DVD without installation.
Download Portable Nero 18.0.16.0 (31 MB) 06/12/16
Tested only working on Windows 10.

Extract and run NeroPortable or NeroExpressPortable.
To change language edit NeroPortable.ini with Language=xx-XX (cs-CZ, da-DK, de-DE, el-GR, en-US, es-ES, fi-FI, fr-FR, hu-HU, it-IT, ja-JP, ko-KR, nb-NO, nl-NL, pl-PL, pt-BR, pt-PT, ru-RU, sv-SE, th-TH, tr-TR, zh-CN, zh-TW) and delete Data folder before restarting.
Settings of installed Nero should be preserved.