Windows Malware: Users logged out as soon as they login to the system.

OK, this is a new problem to me.  Apparently another user had the same problem but was unable to resolve it and resorted to loading the operating system from scratch.  So I will restate the problem and pray for a possible resolve.

Starting off.  The importance of this is high.  My client has multiple programs loaded on her pc that she does not have the software nor registration keys for any longer.  So the burden of figuring out this problem has landed on me.

Here is the previous post https://www.experts-exchange.com/questions/21994155/Malware-trojan-logs-users-out-as-they-log-in.html

Same problem here.

The systems ran for over a year with nortons subscription expired.  We were called out to speed up this over burdened pc and found W32.Beagle@mm running wild on the system.  After an Avast boot time scan, (removing over 2,800 entries of the virus) the system no longer lets users login.  It brings up the desktop, then immediately logs them right back off.  Attempts to run a windows repair has no effect.  I have also used our UBCD4, version 3, cd and manually edited the registry of all suspicious/un necessary services and start up programs to no avail.  Any help in resolving this issue would be much appreciated.

Thanks in Advanced.