When I start the computer in XP mode, a message about some failure appears and the list of possibilities to run can be selected - emergency mode, normal mode, last good etc. With the fact that these are Windows 10 modes.
if your computer stopped responding, restarted, or was automatically shut down to protect you files or folders, choose Last Known Good Configuraton to revert to the most recent settings that worked.
If a previous startup attempt was interrupted due to power failure or because the power or reset button was pressed, or if you aren't sure what caused the problem, choose Start Windows Normally.
Safe Mode with Networking,
Safe Mode with Command Prompt.
Last Known Good Configuration (your most recent settings that worked)
Start Windows Normally
The point is that by clicking any of these options, I actually turn on Windows 10. Is it possible to somehow restart XP without rebuilding the XP system?
In the configuration of disks, nothing has changed, I still have the same number of partitions. It seems that during the XP launch some update has turned on.
Yes, win XP worked but I did not run it very often. Of course, XP was installed first, then 10. Until recently, I had XP and 7 and this duo worked very well for a long time. My laptop is not so new anyway, it's from 2011.
Interestingly, I recently had another problem with booting XP. This system wouldn't run due to the ntoskrnl.exe file that was written to be missed. It helped to change the partition number in the boot.ini file because W10 created the recovery partition, so the numer of XP partition had to be added one...
I was pleased mercilessly, everything worked without reservation, even an update appeared! After a while, I launched XP and such ... bummer appeared.