A desktop PC containing the personal information of up to 36,000 U.S. military veterans has gone missing from U.S. Department of Veterans Affairs (VA) subcontractor Unisys, the VA announced Monday.The PC may have contained VA patients\u2019 names, addresses, Social Security numbers, dates of birth, insurance carriers and billing information, dates of military service, and claims data that may include some medical information, the VA said. Unisys notified the VA on Thursday that the computer was missing from the subcontractor\u2019s Reston, Va., offices.The VA immediately dispatched a team to Unisys to assist in the search for the computer and to help determine what information it held, the VA said in a press release.The announcement comes after the VA said in late May that a laptop and hard drive containing the personal data of 26.5 million veterans and their spouses was stolen from a VA analyst\u2019s home. Police recovered the laptop and hard drive in late June, but the theft set off a series of hearings in the U.S. Congress about the VA\u2019s management and IT organization, with several lawmakers calling for an overhaul of the VA\u2019s decentralized IT reporting structure.On Saturday, Montgomery County, Md., police announced they had arrested two Maryland men for the theft of the laptop and hard drive.In the Unisys case, the VA believes the missing personal records belong to people who received treatment at the VA\u2019s two Pennsylvania medical centers during the past four years. The PC appears to have contained personal information for about 5,000 patients treated at Philadelphia and about 11,000 patients treated at Pittsburgh, and it may have also contained information from another 20,000 people treated at the VA\u2019s Pittsburgh medical center. The PC appears to have also contained information on about 2,000 deceased patients, the VA said.The VA is working with Unisys to offer credit monitoring and individual notifications to potential victims, the VA said."VA is making progress to reform its information technology and cybersecurity procedures, but this report of a missing computer at a subcontractor\u2019s secure building underscores the complexity of the work ahead as we establish VA as a leader in data and information security," VA Secretary R. James Nicholson said in a statement.By Grant Gross, IDG News Service (Washington Bureau)For more information, read Data Theft at the VA.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.