Hello estudiante and welcome to BC
Sorry for the delay in response. We're all volunteers here and sometimes things slip past us.
What is your operating system: Windows XP, Vista, etc.?
Have you tried running McAfee in Safe Mode
Can you post the file path for the virus in question? You should be able to find it in the McAfee log.
Do you have other security programs installed? If so, what are they?
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.
An ounce of prevention is worth a pound of cure
SpywareBlaster, WinPatrol Plus, ESET Internet Security, NoScript Firefox ext.