I suspect you are going to have to supply rather more information in order that the good folks here can try to assist you.
- Mac or PC?
- Which operating system version?
- Where are you trying to install (which drive)
- If PC, do you have an NVIDIA graphics card?
- Anything else that might be of relevance.
FWIW I have PE 14.1 (PE 14 + update) running on a WIN7 PC & am doing OK with it (thanks to the advice from this forum).