System Restore Tool Displays a Blank Calendar in Windows XP

When you run the System Restore tool on a Windows XP-based computer, the calendar on the left side of the "Choose a Restore Point" window is not displayed.

This behavior can occur if the file association for Hypertext Markup Language (HTML) component (.htc) files is not in the registry.

To resolve this behavior, verify that the following keys are in the registry. If one of the registry keys is not present, create the key, and then add the values that belong to the corresponding key:

HKEY_CLASSES_ROOT\.htc
Value name: Content Type
Value data: text/x-component

HKEY_LOCAL_MACHINE\Software\Classes\.htc
Value name: Content Type
Value data: text/x-component

HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/x-component
Value name: CLSID
Value data: {3050f4f8-98b5-11cf-bb82-00aa00bdce0b}

Create a second entry with the following values:
Value name: Extension
Value data: .htc

HKEY_CLASSES_ROOT\CLSID\{3050f4f8-98b5-11cf-bb82-00aa00bdce0b}
Value name ="Microsoft Html Component"

HKEY_CLASSES_ROOT\CLSID\{3050f4f8-98b5-11cf-bb82-00aa00bdce0b}\InProcServer32
Value name: Default
Value data: "C:\Windows\System32\Mshtml.dll"

Create a second entry with the following values:
Value name: "ThreadingModel"
Value data: "Apartment"

NOTE: This procedure assumes that Windows XP is installed in the C:\Windows folder. Make sure to change C:\Windows to the appropriate <windows_folder> if Windows XP is installed in a different location.

To merge all of the information at one time, you can copy and paste the following text into a text editor, such as Notepad, and then save it as a .reg file.

Windows Registry Editor Version 5.00

   [HKEY_CLASSES_ROOT\.htc]
   "Content Type"="text/x-component"
   @="htcfile"

   [HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/x-component]
   "CLSID"="{3050f4f8-98b5-11cf-bb82-00aa00bdce0b}"
   "Extension"=".htc"

   [HKEY_CLASSES_ROOT\CLSID\{3050f4f8-98b5-11cf-bb82-00aa00bdce0b}]
   @="Microsoft Html Component"
   [HKEY_CLASSES_ROOT\CLSID\{3050f4f8-98b5-11cf-bb82-00aa00bdce0b}\InProcServer32]
   @="C:\\WINDOWS\\System32\\mshtml.dll"
   "ThreadingModel"="Apartment""

   [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.htc]
   "Content Type"="text/x-component"
   @="htcfile"



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