Shutdown problem on Lenovo Ideapad Laptop

The display goes to black, but the Power light on the keyboard remains on indefinitely. To complete the sequence, the Power button has to be pressed for about 5 seconds.
(On the other hand a Restart seems to function correctly)
Lenovo Ideapad Z570 Windows 7 Ultimate x64
This is a rebuild so the Novo button just switches the machine on.
Any suggestions gratefully appreciated
Regards
Ulick Corkery

You are shutting down from withen Windows?

Launch an elevated command prompt by going to Windows search and entering CMD and right clicking command prompt and opening as Admin. Now in command prompt enter the following:

shutdown.exe /s /t 00

Does the light shut off now?

Have you tried playing with any of the power settings in the Windows Control panel? You can type power options into Windows search for quicker access.

Yes I am shutting down from within Windows. I am logging in as Administrator.
I tried shutdown.exe /s /t 00 (from CMD prompt) but problem remains
i.e. Display goes to black, but the Power light on the keyboard remains on indefinitely.
shutdown /r works (a bit slow but it gets there)
Sleep is also a problem, but as noted Restart works fine.

You might have an ACPI issue or a BIOS issue. I'd start with checking Windows integrity by entering sfc /scannow in an elevated command prompt. If there are issues found and can't be fixed then you're gonna have to do an in place repair install. If there are no Windows issues then see if that laptop has an updated BIOS by going to the manufacturer's website.

I ran SFC /SCANNOW as Admin.
Verification 100% complete. Windows Resource Protection did not find any integrity violations.
BIOS Version is 45CN38WW (Lenovo support site says this is latest for S/No WB03630242)
This is a clean install done within last week using bootable USB made with Microsoft x17-58997.iso.

hi

lets have an in depth look, ignore the title provides masses of detail
Blue Screen of Death (BSOD) Posting Instructions

Tks for your guidance.
I have run the collector exe and am attaching the resulting zip file.

Hi

nothing particularly stands out within the OS

However
You only have 4GB Ram, not really enough for X64 Ultimate

Am i correct in assuming you are Multi-booting this machine, i see multiple (USB/Sata) drives attached
EasyBCD configuration may be incorrect

quick check would be to disconnect them. see if shutdown works normally

Yes you are correct, I am multi-booting the machine but there is only one Hard Disk (now with 6 Partitions 4 NTFS and 2 FAT32)

See attached slightly rambling txt file.