The Internal Revenue Service (IRS) is currently claiming that seven different IRS officials experienced computer crashes that erased their emails and made it impossible for the IRS to cooperate with congressional investigations into the IRS targeting matter.

The wave of computer crashes apparently struck both Washington, D.C. — where Lois Lerner oversaw the agency’s Exempt Organizations division — and also Cincinnati, Ohio — where agents processed tax-exempt applications.

The Federal Records Act requires IRS employees to save all of their emails pertaining to agency business and to also print those emails out in case they have a computer crash.

IRS commissioner John Koskinen claimed in testimony in March that the IRS employees’ emails were saved on servers, but then testified this month that he doesn’t know of any “magical way” to get the missing emails back.

The IRS canceled its six-year business relationship with the email-archiving firm Sonasoft in September 2011, weeks after Lerner’s computer crash, and also prematurely retired data storage devices at its IT offices in Maryland.

Here are the seven IRS employees who could use a tutorial on hard drive-fixing:

Lois Lerner: Lerner was the Washington-based head of the IRS Exempt Organizations division until her recent resignation. Lerner originally apologized in May 2013 for targeting conservative groups, but later attested to her innocence and repeatedly pleaded the Fifth at House Oversight hearings. The House of Representatives voted in May to hold Lerner in contempt of Congress. New IRS commissioner John Koskinen testified that nobody at the IRS tried to extract any emails from a six-month backup disk after Lerner’s computer hard drive allegedly crashed in June 2011. Lerner’s hard drive was “recycled.” Lerner and her attorney husband Michael Miles live on a $2.4 million property in Bethesda, Maryland.