HiddenFaxWindow freezes computer

HiddenFaxWindow seems to be from the Fax service. Disable the Fax service, if you have no need of it. Or uninstall Fax Services.

To Remove a Windows XP HiddenFaxWindow Component

• Log on as Administrator or as a member of the Administrators group.
• Click Start, click Control Panel, and then double-click Add or Remove Programs.
• Click Add/Remove Windows Components. The Windows Components Wizard starts.
• In the Components list, click to clear the check box next to the component that you want to remove. Clear the check box of Windows Fax Services. Note that a shaded check box next to a component indicates that only some of its subcomponents are installed.
• If you want to remove a subcomponent, click Details. Then, click to clear the check box next to the subcomponents that you want to remove, and then click OK.
• Click Next.
• In the Completing the Windows Components Wizard screen, click Finish.
• Restart your PC.