Lync Login Error - There was a Problem Acquiring a Personal Certificate Required to Sign in

Introduction: 

Here I will explain how to solve the problem of “There was a problem acquiring a personal certificate required to sign in, If the problem continues, please contact your support team.” while login in to Lync communicator in windows 8. Actually this problem occurs when our cached credentials of Lync get corrupted. To fix this problem we need to delete existing certificates and login with your details it will fix your “Cannot sign into Lync. There was a problem acquiring a certificate from the server.” 

Description:

In previous posts I explained physical path but a virtual path was expected in asp.net, jQuery the length of the string exceeds the value set on the maxjosnlength property, jQuery show asp.net exception error message, upload and download files from database in asp.net, download multiple files as zip folder in asp.net and many articles relating to solve errors in asp.net, SQL Server, IIS, etc. Now I will explain how to solve the problem of “There was a problem acquiring a personal certificate required to sign in, If the problem continues, please contact your support team.” while login in to Lync communicator in windows 8.