The State Board of Elections has decertified a touchscreen voting system used in about one-fifth of Virginia's precincts.
The board's action Tuesday means the WinVote machines can no longer be used in Virginia elections.
Gov. Terry McAuliffe ordered an investigation after widespread voting irregularities during the November general election. The glitches included machines crashing or recording a vote for the wrong candidate.
The Virginia Department of Elections hired a federally certified voting system test lab to assist in the investigation, and the findings raised serious security concerns about the WinVote system that is used in 30 localities. A report said the system's wireless capability makes it susceptible to a security breach. WinVote, certified by Virginia in 2003, is the only system in the state with wireless capability.