Apologies, I missed you had already checked for updates. Also check 
battery/hibernation ?

Sounds more machine related than software.

Rob

> On 17 May 2022, at 8:44 pm, Rob Hodgkinson <rhodg...@me.com> wrote:
> 
> A thought Mike, perhaps auto updates ran while asleep in Windows (could 
> explain the restart), and hence if programs “restored” they may have have 
> been “stale”.
> 
> Are you able to check date/time of last Windows upgrade to see if related ?
> 
> Best, Rob
> 
>> On 17 May 2022, at 8:30 pm, 'Mike Day' via Programming 
>> <programm...@jsoftware.com> wrote:
>> 
>> I should also point out that:
>> a) I hadn’t knowingly updated J itself or any addons during or since 
>> yesterday’s session.
>> b) I’m not aware of any other changes between yesterday’s Windows or J 
>> environment (ok for Jqt) and today’s.
>> Thanks,
>> Mike
>> 
>> Sent from my iPad
>> 
>>>> On 17 May 2022, at 07:34, 'Michael Day' via Programming 
>>>> <programm...@jsoftware.com> wrote:
>>> 
>>> Hello.  I tried to wake up my laptop from sleep just now,  as usual - ie I 
>>> leave it in sleep mode while I'm asleep...
>>> But,  as occasionally happens, it must have restarted,  and nothing was 
>>> open.
>>> 
>>> (I wanted to explore the Babylon Spiral topic,  which I've just woken up to 
>>> see!)
>>> 
>>> I now find that Jqt doesn't display any window when I start it.  I can see 
>>> it in Task Manager but it's not usable.
>>> This goes for both J904 beta-c and J903.
>>> 
>>> I recall this happening before,  a few years ago, but can't remember how we 
>>> got round the problem; perhaps it
>>> just went away.
>>> 
>>> Yes,  I did do a full stop and reboot of Windows.  As far as I can see,  
>>> Windows has NOT done a surreptitious
>>> update while I wasn't looking.  It's Windows 11 Home,  version 21H2,  
>>> installed on 26/10/21, OS build 22000.65 ,
>>> Windows Feature Experience Pack 1000.22000.675.0  (very round numbers!?)
>>> 
>>> I'm nothing like as proficient in using J in other manifestations, ie JHS & 
>>> Jconsole.
>>> 
>>> HELP!
>>> 
>>> Thanks,
>>> 
>>> Mike
>>> 
>>> PS - I'll keep trying to run from time to time - will report if Jqt 
>>> suddenly decides to reveal itself.
>>> 
>>> 
>>> -- 
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