I have come across this error on W7 32 bit prof versions. These are error on machines that have been in environment for some time, so just started to display the error when logging in. If you a secondary id and pass to logon to the machine, logon with it, (must be a admin rights user id) then open reg edit and change the settings as follow.
This will enable profile loging.

Use Registry Editor to add or to modify the following registry entry:
Subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Entry: UserEnvDebugLevel
Type: REG_DWORD
Value data: 10002 (Hexadecimal)

Note: UserEnvDebugLevel is given a value of 0×00010002, LOGFILE and VERBOSE are both turned on.

Once completed, logoff the machine, then log back in using the same id and pass which you know will trigger the error again.

The log file is written to the %Systemroot%\Debug\UserMode\Userenv.log file.

open a case with Microsoft, W7 is supported for all users, so once opened you then forward them the logs in order to troubleshoot further.

Best way however, would be to create a new profile id, rename the user folder name that has the issue to .old then log back in if on a AD domain. If you are not on a domain, you will need to recreate the profile.