By installing I got error 1303, and I couldn't go on. Now the total program has gone

I have tried to install it several times, but didn’t succeed. This cost me now a lot of time. Please help me.

OS and version? (LibO version? Former version? Source of binary?)

Thsi is likely to be a Win (7/8) related problem. Win should offer you to acquire admin rights, as it regularly does (“Do you allow …?”)

Did you study this thread?