While the above was going on I researched upgrading the hardware, It has 2gb memory and can't take more, the hard drive could be upgraded to SSD, the only problem I can see is that task manager shows it is CPU bound without to much disk activity. Same driver date ?) and it now seems fairly stable. So I resorted to DEVICE MANAGER that had failed to allow an upgrade of the HD500 driver before, strangely it allowed me to search for a driver and offered an Intel HD500 driver and a Microsoft generic driver, it successfully loaded the HD500 driver (with To upgrade the HD500 graphics driver I tried to use the Intel driver support utility but it would not let me run it without logging into intel, and did not format correctly on the browser to do so. once upgraded to 1909 the screen 'flashed' BLACK for several seconds every time the screen during the 1903 phase the BLACK SCREEN above occurred several times. I have allowed the laptop to upgrade itself to windplus cumulative updates. I checked at the time for a graphics driver upgrade, but it appears Intel are no longer supporting

I could see disk activity, so not crashed, I found that putting the laptop to sleep with the power button, and reawakening and logging in 'cured' it temporarily.

I remembered I did have problems with an intermittent BLACK SCREEN where the mouse and keyboard did not work no 'control alt del' etc. I get no errors, it is just very slow (it was never quick) but it is unusable slow these days.

Windows 10 acer aspire one