Hi,

Any other messages such as a file not being found at such and such place?

Your problem probably is such that you need to reinstall the previous version before you can reinstall a new version. Thus, what's the version you're installing now and what was it before?

Thank you for your answer.Firts time I reinatsled old boinc version,but the problem was the same.I´ll try your link.Iĺl write You Results.Greeting from Jeseniky Mount. in Czech Rep.