My Computer when I boot its showing this massage windows cannot find rvhost.exe



Please tell me what I have to do
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That's a GOOOD thing. That is a virus (worm)

Try downloading and running this Malwarebytes' Anti-Malware (Malwarebytes.org (http://www.malwarebytes.org/mbam.php) just get the free version) hopefully it will find and remove all the resto for the pieces.

Windows cannot find rvhost.exe