Windows Protection Activation

Problem: When entering in XP there is error "A problem is preventing Windows from accurately checking the license for this computer. Error Code: 0x80004005"

Activation is not working.
Restart works, but after some time or opening IE, programs start to fail on by one (task manager also). Logging off and entering again in Windows produce Activation error again.

Solution found on Microsoft works:
3. Press 1 to access your primary drive installation with Recovery Console. 4. When you are prompted to do so, type the administrator password. If you have not set an administrator password, press ENTER to continue. 5. Type cd %SystemRoot%\System32, and then press ENTER. 6. Rename the following files by using the REN command. To do so, follow this syntax: REN file_name.extension file_name.old • Wpa.dbl • Pidgen.dll • Actshell.html • Licdll.dll • Regwizc.dll • Licwmi.dll • Wpabaln.exe 7. Type the drive letter of your CD-ROM drive followed by a colon (for example, "D:"), and then press ENTER. 8. Type cd i386, and press ENTER. 9. Type the following commands one at a time. Press ENTER after each command: • expand licwmi.dl_ %systemroot%\system32 • expand regwizc.dl_ %systemroot%\system32 • expand licdll.dl_ %systemroot%\system32 • expand wpabaln.ex_ %systemroot%\system32 • expand wpa.db_ %systemroot%\system32 • expand actshell.ht_ %systemroot%\system32 • copy pidgen.dll %systemroot%\system32 10. Type Exit and press ENTER to restart the computer.
http://support.microsoft.com/default.aspx?scid=kb;en-us;306081

After restart, error message will appear again!
But now, it will be possible to activate Windows.