psconfig -cmd upgrade -inplace b2b -wait
Fix is in the comments by “maxmorgan” on the link below
http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2009/02/24/the-search-service-is-currently-offline-visit-the-services-on-server-page-in-sharepoint-central-administration-to-verify-whether-the-service-is-enabled-this-might-also-be-because-an-indexer-move-is-in-progress.aspx