Cant remove Roles or features

[TB64]

I have a Windows Server 2008 enterprise 32bit, it used to be a DC then was demoted. All good so far, it is now a file server the problem is I cant remove roles or services, it remove them reboots and says reverting back. It then tries to remove the role again and follows the same path, it does this 3 times then say it can not do it again and reboots. Also I cant update the server all updates fail, cant install software etc. The server runs people can access there files fine. Is there anyway of doing a system repair, to check files are present and correct folders have correct permissions etc, I dont really want to do fresh install if I can help it.