Since January 2015 (Firmware V2.3a), we use a signed driver by Microchip (ARS-USB microcontroller) so newer operating systems such as Windows 10 (or previously Windows 8) will not generate any more problem to recognize the device connected to the USB port.

Windows will associated the device as a serial port. Therefore, from this date all equipments are using Vid & Pid = 04D8 & 000A, values for which the driver was signed. But there are devices like ARS-USB that are on the market since 2011, then employed versions prior to that date and use a non-signed driver.

In Windows XP they are working correctly but when they are connected in Windows 10, they will not work because Windows will require a signed driver. You need to upgrade the firmware and you have several ways to do it:

So we suggest to upgrade all equipments released previous to 2015 or firmware version before V2,3a

A.- Computer with previous OS (XP or Win7)

Whenever possible, the simplest certainly is to use a computer with Windows XP or 7 wherein the unsigned driver can be used and update your device with the Teleloader to its latest version.

B.- Installing the driver without the signed Driver

There is a trick – at least under Windows 8 – we can use to skip the security and to install the signed driver. It is not the best solution, but an alternative to the previous method. The steps to install an unsigned driver in Windows 8 are:

Executing commands via CMD in Admin Mode. Then executing the following Command: bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS bcdedit.exe -set TESTSIGNING ON Restarting PC. Installing ARS-USB Driver. Executing commands via CMD in Admin Mode: bcdedit -set loadoptions ENABLE_INTEGRITY_CHECKS bcdedit -set TESTSIGNING OFF Restarting PC DONE! Note: Thanks to Marco HB9ZAG for this help.

C.- Driver instalation in Windows 8 (with Secure Boot Policy)

Dave G0BCW has written a very good article about how to install the ARS-USB driver when the computer has enabled the Secure Boot Policy. To read the full article follow this link:  

D.- Order a new microcontroller

It is not the fastest method but order a new microprocessor may be the last option that you can get. A new CPU plus shipping costs, it is not too expensive but sure it will work and without any problem.