What is EEPC version?
You need to give much more detail of the problem, error messages etc.
Perhaps the users forgot their passwords? Without knowing the nature of the problem it's impossible to comment.
While login users were getting following message Authentication parameters incorrect
User were putting right password, their was no password change at AD as well as McAfee
10-15 users were affected at same time..
Users were able to login to Windows(domain), And on affected laptops we were able to login with another user to McAfee...
I have Opened case with support SR#3-1652221461, please go through the case and u'll find all the required Details.
Hemant - this is the community, it's not tech support. We don't look at cases here, in fact, I don't even have access.
The error though means the user is typing the wrong password, so perhaps they have the wrong keyboard selected, an admin reset their password, or they changed their password on another machine, which came online and reflected that everywhere else.
I doubt very much there's any problem with the software here, as otherwise everyone would be experiencing it. Most likely they are simply typing the wrong password for their account as far as this machine is concerned.