Check the date and time, if it is not correct, correct it and restart the computer
What is the type of Operating system ? ( Windows XP / Windows VISTA / Windows 7 )
What is the type of internet connection ? ( DSL / Dial-up / Cable / Wireless / Satellite )
May I know how were the mcafee programs removed ?
Also let us know what is the operating system of the computer ?
How old is the computer ?