Please fix my vista error when I logon windows

[kiep]

The date 5.3.2010, I started my laptop (HP dv5T with vista x64 Windows – Home Premium). Before going to the welcome screen, a small dialog box appeared with the content below:

Quote:

LogonUI.exe - Bad Image
C:\Windows\System32\adsldpc.dll is either not designed to run on Windows or it contains an error. Try installing the program again using the original media or contact your system administrator or the software vendor for support.

I must click 4-5 times for close it for getting the desktop.
And this dialog will be appear again after I turn off (shutdown) the laptop, as similarly as starting the computer.
In the progress I use computer, I still see another dialog box with the content below:

Quote:

Virtual Disk Service stopped working and was closed
A problem caused the application to stop working correctly.
Windows will notify you if a solution is available

Please help me fix these errors. thank you very much.