Wonder if anyone of you cats would care to comment on my weird computer behavior ?
Ever since I switched my board from legacy boot to UEFI boot, my computer always
restarts to BIOS when I use Windows power button, "restart" selection .  Everything else
works really good, and I don't restart that much, so I've given up on fixing it .  All I have to
do is press F10, and then enter key and Windows starts right up .  Also "shut down" is normal,
and cold boot with the computer case start switch is normal .  Boots to log-in screen in 13-14
seconds with Windows fast boot on .  18 seconds with fast boot off .  Also sleep is disabled .
I'm new to UEFI, but this seems wrong somehow .
 
My computer is:
 

Intel 8086K CPU
EVGA Z370 Classified K M/B in UFEI mode
G.SKILL TridentZ Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel Z370 Platform Desktop Memory
Model F4-3200C14Q-32GTZ
GIGABYTE AORUS AIC 1TB PCI-Express 3.0 x4, NVMe 1.3 3D TLC ToshiBa BiCS3 Internal Solid State Drive (SSD) GP-ASACNE2100TTTDR
( Windows 10 home 64 bit system drive, GPT formatted by Windows, PCIe slot 6 )
WH16NS40 Internal SATA 16x Super Multi Blue DVD burner
( in SATA port 1 )
HyperX Savage 2.5" 240GB SATA III Internal Solid State Drive (SSD) SHSS37A/240G  ( data storage, SATA port 2, GPT formatted )
WD Black 1TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s  ( data storage, SATA port 3, GPT formatted )
EVGA GeForce GTX 1080 GAMING, 08G-P4-6181-KR, 8GB GDDR5X,
ACX 3.0 & LED  ( Video card in PCIE slot 2 )
LG 32” Class QHD Gaming Monitor with G-SYNC 32GK850G-B
EVGA SuperNOVA P2 850W Modular Power Supply
( eco mode off )
Logitech USB keyboard, Logitech USB mouse, Xbox1 USB game controller
BIOS version 1.14, latest Windows, all drivers up to date, and Microsoft, or
Vendor provided .
 
Some might say, "well it's your PCIe SSD, it's not compatible ."  But, it works great, and I got the problem right away before I had it .
I was running OS on the 240Gb SATA SSD, it was fine, then I converted it to GPT, switched to UEFI booting and got the restart
problem .  Then I installed my PCIe SSD add In card, formatted it GPT, pull the data cables to the other drives, and clean
installed Windows after BIOS 1.14 update .  Then I clean installed it again, same .  Even during Windows set up .
 
Anyways, I'm living with it 'cause I'm too dumb to fix it, and otherwise the computer is absolutely fabulous :|
 
cotter32
"to the moon, Alice"
 
 
 
 

So the current OS / BOOT drive - was Clean Installed in UEFI mode ? - "PCIe SSD add In card, formatted it GPT, pull the data cables to the other drives, and clean
installed Windows after BIOS 1.14 update"
 
Have you tried clearing the BIOS & loading default, then save & exit - Reboot & reentering your settings ? (or switching to your second BIOS - if your MB has that feature)

Re. Cool GTX;
 
Yes, clean installed twice .  I blew-up the first installation trying to fix it with command line stuff .
... always had good luck with command line stuff before that .  Live and learn .
I cleared the BIOS and set it to default like you said, both times I think, last time for sure .
Step by step UEFI install with EVGA manual in hand .  After that I tried clearing CMOS, and
reflashing BIOS .  BIOS is working great except for that one thing .
I did not switch to second BIOS as the switch is conveniently located underneath my 1080 graphics card .
... also BIOS 2 has never been updated .  I found one post about this behavior on the net, and it
seems the user had more than one active boot partition .  I've run diskpart, and messed around, but
I can't recall if diskpart told me the active partitions, or not .  I did determine that diskpart in Windows 10
is a little different than diskpart in Win 7 .  Maybe I'll try figuring out my active partition situation, again 
pretty soon .
 
 
cotter32

Re. MhzManiac
 
I was looking at that recovery partition with disk management, and diskpart last night .  Mine has no drive letter,
and is on the same physical drive as partition C: system drive, boot drive .  Recovery was FAT32, the rest NTSF, all
physical drives GPT partitioned .
Both programs work differently in UEFI mode .  Neither tells what partitions are marked active, or will mark any
as active ( option is greyed out in disk management ) .  I get the impression that an "active" partition is not
applicable to UEFI booting .
I never have any bad starts if I cold boot, but every restart from Windows is bad as it goes to BIOS ( UEFI setup ) .
It goes; "restarting", momentary blank screen, two quick beeps, BIOS splash screen with press DEL, or F12 to
enter setup ( A0 is in the lower right corner ), then after about 10-15 seconds the BIOS set up screen opens .
I hit F10, then enter, and Windows boots up almost immediately .  I'm beginning to think of it as a feature
instead of as a problem ;)
Oh, yeah, UEFI is enabled, legacy and CSM disabled .  Secure boot is off .  Secure boot doesn't want to load
my Creative sound driver .
 
"... zip, bang to the moon ."
cotter32
 

Re. MhzManiac;
 
Thanks for sharing .  My system disk looks much like yours, but with only 4 partitions .  I don't know what that 16 MB "reserved" partition is .
Reserved by Windows, or the SSD ?  Alice's personality ?
 

DISKPART> list disk
  Disk ###  Status         Size          Free          Dyn   Gpt
  --------  -------------  -------       -------          ---     ---
  Disk 0    Online          953 GB      0 B                       *
  Disk 1    Online          931 GB     1024 KB                 *
  Disk 2    Online          223 GB     1024 KB                 *
DISKPART> list volume
  Volume ###  Ltr  Label                      Fs          Type          Size           Status             Info
  ----------   ---  -----------                   -----      ----------     -------      ---------          --------
  Volume 0         D                                DVD-ROM                0 B         No Media
  Volume 1         Recovery                   NTFS    Partition     499 MB       Healthy
  Volume 2         C                              NTFS    Partition      953 GB      Healthy          Boot
  Volume 3                                         FAT32   Partition       99 MB      Healthy          System
  Volume 4         F   New Volume          NTFS    Partition      931 GB      Healthy
  Volume 5         E   New Volume         NTFS    Partition      223 GB      Healthy
DISKPART> select disk 0
Disk 0 is now the selected disk.
DISKPART> list volume
  Volume ###  Ltr  Label                   Fs                  Type                     Size        Status            Info
  ----------   ---  -----------                 -----              ----------               -------    ---------          --------
  Volume  0       D                              DVD-ROM                                     0 B      No Media
  Volume  1       Recovery                   NTFS            Partition                499 MB     Healthy
  Volume  2       C                              NTFS            Partition                953 GB     Healthy        Boot
  Volume  3                                       FAT32           Partition                99 MB      Healthy        System
  Volume  4     F   New Volume           NTFS            Partition                 931 GB     Healthy
  Volume  5     E   New Volume           NTFS            Partition                 223 GB     Healthy
DISKPART> select volume 1
Volume 1 is the selected volume.
DISKPART> list partition
  Partition ###      Type                        Size             Offset
  -------------       ----------------          -------           -------
* Partition  1        Recovery                 499 MB        1024 KB
   Partition  2        System                     99 MB        500 MB
   Partition  3        Reserved                  16 MB         599 MB
   Partition  4        Primary                   953 GB        615 MB
DISKPART>
 
What do you think of that mess ?
 
P.S. That's a boss system you got there, MhzManiac !  Looks good, too .
 
cotter32