screen keeps refreshing

After the last build my screen keeps refreshing every 20 seconds or so.
Never had this before.

build 180428-1349 strange!!.

Try3 said:

Check for an updated display driver & install it or, if the existing one is the latest available, reinstall it.

I suggest this because the symptom might indicate that the display driver is going wrong every 20 seconds or so & restarting itself.

Denis

I shall try this i was thinking along the same lines (maybe a sync problem withe the video card). Will let you Know Later just doing a virus scan.

regards and thanks.

O/k. It was not the driver.
I have installed my last backup build 1762(April) and everything is fine.
I shall now update to the present build as and when it lets me and keep an eye on which one produced the fault.

thanks again Topper.

now loading 1803 see if this solves the problem