Having a number of different systems we have had much success with the PROLIFIC 3.2.0.0 driver.You can get it at the following site at no charge: https://strykerradios.com/software/Win_Driver_Prolific_3.2.0.0.exe

How to install the Prolific Driver for MS WINDOWS SYSTEMS

Do not plug the programming cable yet.

Load the Prolific driver onto a folder on your computer. The driver that seems to work without complications is version 3.2.0.0.
Launch the driver so it installs in your system by double-clicking the icon. This will take a few minutes.
While the driver is loading and doing its thing, pick a USB port for your programming cable and note that. A little piece of colored tape next to that port will serve as a reminder. Your programming cable needs to be put in the same USB port every time, or else the COM port selection may not work.

Do not go any further until the driver is done loading.

Once the driver has loaded, insert the programming cable – do not connect to the radio yet.
Allow your computer to configure the driver to the cable. This takes a few minutes.

Once the computer has finished this process, you will probably see a notice on the bottom right corner that it is done.

Go to the Control panel, and in the System section, locate and open your DEVICE MANAGER.
Look for PORTS COM & LPT and CLICK it open.
Click PROLIFIC USB TO SERIAL COMM PORT (COM X)
Click Port Settings

They should read
Bits per second: 1200.
Data Bits: 8.
Parity: NONE.
Stop bits: 1.
Flow Control: None.

Click ADVANCED

COM PORT should be set for COM 1 If your system COM 1 is used try to select a low number and make a note of that for when you configure your software for later.

Click OK when done, and the ADVANCED window should be closed, and you should be back to PROLIFIC PROPERTIES

CLICK DRIVER (this is the tricky part)
The driver should read VERSION 3.2.0.0
If not, click UPDATE DRIVER
BROWSE MY COMPUTER FOR DRIVER SOFTWARE
Click LET ME PICK FROM A LIST OF DEVICE DRIVERS ON MY COMPUTER
Select PROLIFIC 3.2.0.0

CLICK OK until you are back to the DEVICE MANAGER Window

Close DEVICE MANAGER.
12 Load Stryker programming software.
Set COM port to the correct COM PORT, which you have set in your Prolific Driver

Windows 7 tends to update drivers automatically; this can be a problem because the newest PL-2303 driver doesn’t work correctly with our software. For instructions on how to do so, please visit the following link Support Microsoft

Software Dowloads

Software Download for 10 Meter Radio:

10 Meter Radio User Manual Download:

This is an updated file that explains how to make the SR-955 / 655 USB cables work with Window 7. Essentially it explains what version of the driver needs to be installed and how to do it.

Driver Installation Instructions

PROLIFIC 3.2.0.0 DRIVER GUIDE FOR WIDOWS 7 & Windows 8