Something's wrong, that link won't open for me now. OK, let mne quote from the article.
"Use Registry Editor to view the following two Windows registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Verify that all the values in these keys do not contain any incorrect, incomplete, or null entries (such as "").
MORE INFORMATION
An incorrect entry in the following registry value has been confirmed to cause the behavior described above:
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Value: ActiveMovie File Extensions
Value Type: REG_SZ
Value Data: ActMovie.exe /Check
If the value data for this entry is null or appears in Registry Editor as quotation marks, you may experience the problem described above. To correct the problem, change the value data to match the entry above or delete the ActiveMovie File Extensions value.
This behavior can also occur if the Reminder value that has "" next to it is in the following registry key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\Run
You can resolve this behavior by deleting the Remainder value.
If you are uncertain whether an entry is incorrect or incomplete, you may want to delete all entries other than the default Windows entry. The following entry to run the System Tray is the only required Windows default entry:
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Value: SystemTray
Value Type: REG_SZ
Value Data: SysTray.exe"