I have solution for problem with showing graphics in BOINC. The only thing you have to do is:
1. Open \"Computer Management\" (Right click on \"My Computer\" and click on \"Maintenace\")
2. Open \"Services and applications\" and select \"Services\".
3. Find service called \"BOINC\", double click on it and open the second tab called \"Login\".
4. Set login from \"This account:\" to \"Local system account\" and click \"OK\" to save chcanges.
And that\'s it! Restart service or computer and graphics will show now!

It is not needed to allow service to interact with desktop. All work well (TESTED).

I had trouble when the service wasn't allowed to interact with the desktop, the manager wasn't able to communicate with the service

I suggest as a precaution that people tick the "allow service to interact with desktop" box