Programs flashing, start up, unable to use Lite 5.0

[Moltke]

I have downloaded and install all the latest updates (itbtook about 4 hours, I'va a very slow internet connection).

Everything worked fine for another 2-3 hours then my Firefox browser started flashing on and off as well as the file manager, my Home directory and some popup (or other left click dialogue box with about five entries but I was ubable to read them) and any other program I had open as well as some I did nt ooen.

Absolutely impossible to work with this happeninh. I used the CTRL+ALt+Del4 times to get out of the problem but on getting back into the system the same thing happened again, eacjh time.

Any suggestions, please.

Linux Lite 5.0 is certainly not as easy to use as Windows 10 inspite of all the microsoft issues. I looked at installing upgrading to  lite 5.02 but it really seemed quite daunting so didn't go that route - yet!

Can you post your hardware information, please? CPU, GPU, machine make and model and anything else that can help.