I have a problem in the fourth version upgrade to version 5.1.7

[Sons Coptic]

I have the release version of the fourth and when you upgrade to the issuance of the fifth He talked to me a problem and are taking a very long time in the preparation of topics and often stop .
trying to upgrade two days ago to now
Help me

[captainslater]

If the upgrade stops you can rerun it via upgrade.php and it will continue where the process has stopped.