ZeroAccess.hi is a variation of a kernel mode ZeroAccess rootkit infection, which is able to damage a whole network of computer systems. ZeroAccess.hi infiltrates into the targeted computers through system vulnerabilities, drive-by downloads, freeware applications, spam email attachments and many other ways. ZeroAccess.hi hides itself from security applications to avoid detection and removal from the infected PC. ZeroAccess.hi may block legitimate applications from running or slow your computer. ZeroAccess.hi may also redirect the compromised web browser to doubtful websites.