W. Va. Code § 41-5-9

Every such order or judgment of a county court not appealed from in proceedings for probate in solemn form, or in an ex parte proceeding which has been converted into a proceeding in solemn form by a contest therein, and every such order or judgment of a circuit court on appeal, shall be a bar to a bill in equity to impeach or establish such will, unless upon grounds which would give to a court of equity jurisdiction over other judgments at law.