Anyone plz help me to remove the virus "userint.exe"?

my problem is that every time i boot my system i got a pop up message telling to logon with your password....but i have not set any password for my computer....i have tried several antivirus softwares but none of them solve my problem...so how can i remove the virus?plz help.....

Anyone plz help me to remove the virus "userint.exe"?virus scanner

http://www.processlibrary.com/directory?...

Anyone plz help me to remove the virus "userint.exe"?anti virus software

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boot into safe mode

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entries:

HKLM\Software\Microsoft\Windows\Curren...

NetLogon=userint.exe

HKLM\Software\Microsoft\Windows\Curren...

NetLogon=userint.exe

and delete them if they exist.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKU\[code number]\Software\Microsoft\Windows\

CurrentVersion\Run\NetLogon=userint.ex...

and delete it if it exists.

Close the registry editor and reboot your computer.

Reboot into safe mode again, search for the userint.exe file and delete it from your computer, permanently, now check the registery again to make sure all mentions of userint.exe are gone then reboot into normal mode