DEBUNKED Claims regarding unauthorized files or "500 DLL files" often stem from partisan audits, such as in Antrim County, Michigan, or Coffee County, Georgia, which were rejected by state election officials and experts as misleading or based on a misunderstanding of how the software functions. Claims that federal investigators found 500 "illegal DLL files" or "massive alterations" inserted into Dominion voting machines after certification to swing the 2020 election are false and have been debunked by federal, state, and security experts. The U.S. Cybersecurity and Infrastructure Security Agency (CISA), a part of the Department of Homeland Security, found no evidence that any voting system (including Dominion) was compromised or altered to change votes in the 2020 election. A forensic audit in Georgia, which included a risk-limiting audit of paper ballots, verified that the software and firmware on machines were certified and that no tampering occurred. Dominion Voting Systems filed defamation lawsuits against proponents of these theories (such as Sidney Powell and Rudy Giuliani), with major media outlets settling for hundreds of millions of dollars over the promotion of false claims. Multiple audits and court rulings have confirmed that the 2020 election results were accurate. The assertions of widespread, secret, post-certification changes to voting machines are not supported by evidence and have been refuted by federal and state officials.