I have run many versions of WL on Win XP/7/10 and with dual monitors with no problem. I like the one feature of WL where it shows the storm total over the duration of storm rather than resetting at midnight like a lot of the other software out there. I have had it on dual DVI monitors, HDMI and DP with no problems. So I doubt it is WL. The only time I had squirrely video was during Win7 and I had some old ATI (now AMD) video cards and I allowed Windows to install its own drivers. I had to removed the Windows drivers and download the ATI drivers. I learned just because Windows installs a driver automatically doesn't mean it is as good as the native ones from the company. I got rid of those old ATI cards because of no support or compatibility. I still run WL 6.05 along with several other weather programs thanks to Virtual Vantage Pro. (My Envoy/serial logger feeds WL, Cumulus, Weather Display, Addin-Wx and Weather Solution....but this is off the track here). Need some hardware info so let us all know how we can help you.
What model of computer are you using ? How are are the monitors connected to the PC..DVI/HDMI/DP ? Are you using your computers onboard video or do you have video card/s and what model of card are they ? Are you running dual cards or are they like the AMD Radeons that are dual channel DVI and have a Y splitter? (I have had several Y splitters on the ATI cards that became flakey.) What brand of monitors are they and are they the same resolution or do you have 2 different models/resolution ? What version of WL are you running ? How is your Envoy connected ? Serial/Serial to USB/USB greendot ?
Sorry for the questions but this is sounding like a video hardware/driver problem.
It is an older Gateway FX computer that was Windows 7 and was upgraded to Windows 10.
The video card is an ATI (AMD) Radeon 5770 1024MB
The monitors are ASUS connected by HDMI and HP connected by DVI and both with the same resolution 1920 x 1080.
WeatherLink version 6.0.5, as far as I know, it is the latest version.
Envoy / datalogger is a serial USB
I just came back to the computer to check email and messages and the monitors were pixelized on 30% of each screen. I now have WL shut down, so it is not the WL software causing the issue. I assumed it was because it only started doing this after I installed the software when I bought the envoy and the datalogger.
Something else is going on and maybe the video card is going, it is an older computer.
Thanks for the reply.