I've got a problem: BOINC can't download some projects' files. SETI@Home, Einstein@home, rosetta@home are doing well. But for Milkyway@Home, for example, BOINC (for some reason) can't download any "stars*.txt" files. Downloading progress shows 100%, but files are still in downloading queue, trying to finish download again and again.

I tried to delete these files. I tried to restart project. I tried even to delete project itself and add it again. No luck, everything the same.

The same problem with PrimeGrid. One dll file stopped at 100% and can't finish downloading.

What can I do with this problem?
Thank you.

Post at the projects their forums first. That's where the problem seems to come from, so they should have all the (server-sided) logs to see what your host is trying to do. See if there's other people with the same problem.

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I did that (still no answer). But I think may be this problem is related to BOINC? Because it spreads across different projects.

Not if both the projects where you have the problem have server problems at this time. You other projects seem uninfected, so not completely a BOINC problem. Therefore, ask at the projects if an admin can check the contact log for possibly more information.

And when BOINC can't download anything 'for some reason' it will always show this in the messages or Event Log.

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