"Not POWNED or CLASSDC hwndCurrent" error, preceded by Assertion "FALSE" in win32k/ntuser

47016
Happens frequently lately doing anything, I noticed it particularly when closing windows.

(subsystems/win32/win32k/ntuser/vis.c:75) ATM the Current Window or Parent is dead!
(subsystems/win32/win32k/ntuser/vis.c:75) ATM the Current Window or Parent is dead!
(subsystems/win32/win32k/ntuser/windc.c:738) Not POWNED or CLASSDC hwndCurrent -> 20168
Assertion 'FALSE' failed at subsystems/win32/win32k/ntuser/windc.c line 739
PuTTYEntered debugger on embedded INT3 at 0x0008:0x808e5e5e.
kdb:> bt
Eip:
<ntoskrnl.exe:e5e5f (lib/rtl/i386/debug_asm.S:33 (DbgBreakPoint at 0))>
Frames:
<win32k.sys:7b79e (subsystems/win32/win32k/ntuser/windc.c:739 (@DceFreeWindowDCE at 4))>
<win32k.sys:7f69c (subsystems/win32/win32k/ntuser/window.c:488 (co_UserFreeWindow))>
<win32k.sys:7fab7 (subsystems/win32/win32k/ntuser/window.c:2747 (@co_UserDestroyWindow at 4))>
<win32k.sys:7faed (subsystems/win32/win32k/ntuser/window.c:2771 (NtUserDestroyWindow at 4))>
<ntoskrnl.exe:6fb7 (ntoskrnl/ke/i386/traphdlr.c:1564 (@KiSystemServiceHandler at 8))>
<ntoskrnl.exe:e041d (ntoskrnl/ke/i386/trap.s:127 (KiInterruptTemplateDispatch))>
<ntdll.dll:7ac5>
<user32.dll:47ed1>
<user32.dll:48063>
<ntdll.dll:7a1d>
<explorer.exe:16ded>
<explorer.exe:436c6>
<user32.dll:47ed1>
<user32.dll:4851d>
<user32.dll:48768>
<user32.dll:2cf50>
<user32.dll:2dd16>
<user32.dll:2eaad>
<user32.dll:2eb70>
<user32.dll:3b92d>
<explorer.exe:16e2a>--- Press q to abort, any other key to continue —

<explorer.exe:436c6>
<user32.dll:47ed1>
<user32.dll:4851d>
<user32.dll:48768>
<user32.dll:4bfa2>
<user32.dll:4c06b>
<user32.dll:2d5ed>
<user32.dll:2eaad>
<user32.dll:2eb70>
<user32.dll:3b92d>
<explorer.exe:16e2a>
<explorer.exe:436c6>
<user32.dll:47ed1>
<user32.dll:4851d>
<user32.dll:48a5b>
<explorer.exe:4296c>
<explorer.exe:4dd23>
<explorer.exe:51c4b>
<explorer.exe:60ad9>
<explorer.exe:60906>
<explorer.exe:60968>
<kernel32.dll:2ef7b>
— Press q to abort, any other key to continue —
<00000000>
kdb:>