Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Installation could break computer, require XP reinstallation to fix

Do not buy this software, it could break Windows during installation. I spent hours trying to fix XP, and eventually had to reinstall XP to fix it. I bought a 3-user licensed copy. It was successfully installed in the first computer. (The automatic set up for live update does not work, but that's a separate problem.) When I installed it on the second computer, it broke XP. None of the programs could be launched afterwards. It left Windows XP in a totally unusable state.