Contact us about technical problems, questions regarding your order, business proposals or press information.

Speed too low?
Maybe the cFos Speed Guide can help

Questions about order, payment, or delivery?
Customer Care Center

Turn off the status window?
How to turn off auto-open of the status window

Quickly help yourself

For preliminary information you may want to consult our page for OEM partners

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All information regarding order, payment, or delivery is available here:
Customer Care Center

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For tips how to improve your Internet speed with cFosSpeed, see the cFos Speed Guide.

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Please refer to our cFos Speed Guide for help, how to calibrate cFosSpeed for optimal performance.

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Please refer to our cFos Speed Guide for help, how to get maximum speed.

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Please refer to our cFos Speed Guide for help, how to get minimum ping.

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Here you find help how to install your license key.

Here are additional hints how to find and install your license key.

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Sometimes other components, e.g. network drivers, anti-virus software or anti-spyware, in the network installation prevent cFosSpeed from being installed.

Here is help for the most common installation problems and what you can do if cFosSpeed doesn't install.

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You can deactivate the cFosSpeed status window by right-clicking on it and then selecting "Hide Windows".

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If you get a Bluescreen/BSOD caused by cFosSpeed, we need your help to fix it as quickly as possible.

Please create a kernel dump.

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Please see our important ISDN CAPI / Network CAPI hints.

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Please see our instructions on how to setup cFos Outlook DAV with Google Calendar.

Please provide us - if possible - with the following information:
Which version of Outlook are you using?
Which calendar or contact server and which version of it are you using?

Send us a message

Please enter your question or suggestion and your e-mail address into the form and press the "Send" button. We will contact you as soon as possible.

Quickly help yourself

ASUS, Gigabyte and ASRock offer cFosSpeed OEM versions for certain motherboards. Updates for these OEM versions are available at motherboard manufacturer's website. If you install a regular cFosSpeed version over your OEM version, a 30 day trail period starts after which you can either buy a cFosSpeed lifetime license from us or uninstall cFosSpeed and install the OEM version again.

If you like cFosSpeed we would appreciate you buying the lifetime license from us. Your benefit will be access to all future cFosSpeed betas and releases. Although our OEM partners offer updates, we typically have a faster update pace with new versions and new features.

Earn license key

If you would like to earn a license key for cFosSpeed and cFos Personal Net by sending us instructions for your router, please enter your router brand and model and your e-mail address into the form and press the "Send" button. We will contact you as soon as possible.