How to speed up Windows 8 on Samsung laptop?

I got Samsung Series5 ultrabook with Windows 8, but I found windows 8 problem with samsung notebook - it unreasonably slow to reboot and install updates.

Once I removed Condusiv IntelliMemory from my new Samsung Notebook with Windows 8, which was very slow. Now it is so fast! Solved my problem windows 8 problem on samsung notebook.

My old situation before solving windows 8 problem:
Last night I waited for 1h30 for it to install 1 update and reboot, when I finally gave up and switched it off during reboot. Another thing that I noticed is that HD I/O is too high for a reboot - the HDD light doesn't turn off during the process, and the notebook gets really warm.
I tried to reboot it another day, without any updates to install, and after 4 hours it was still in the reboot screen. I had to do a hard reboot.
I found specially weird that even with a worse machine, Windows 7 would do both things (install updates and reboot machine) faster.
Does anyone know a way to speed things up? Is there any configuration that I can make? Is this a Windows 8 bug?

One of my friends also has a Samsung Windows 8 laptop and also is experiencing windows 8 problem on samsung notebook. He disabled Samsung notebook service "IntelliMemory" service and that solved windows 8 problem being slow and all of his issues.

If you have windows 8 problem with samsung notebook, you can go and make it yourself:

1. Run services.msc
2. Locate "IntelliMemory"
3. Right Click -> Properties
4. Startup Type -> Disabled
5. Click "Stop"
6. Click "OK"
7. Reboot

As suggested by others, this would seem to be a hardware fault. We are dealing with slow Windows 7 startup/shutdown in an enterprise setting at the moment but even we are only dealing with 8 minutes.
If it were a few minutes delay, I'd suggest a network issue but given the extreme time, I would think that it is a Hard Disk fault.

• Run the program RUN.exe and then write MSCONFIG and Enter.
• In the program go to the Services and click Hide all Microsoft services, now stop some services that you don't need, like AMD, Google Update, Hamachi, utilities from the manufacturer, Skype Updater.
• Go to Task Manager, go to Startup and disable the unnecessary apps, for example: µTorrent, apps from the manufacturer, Skype, Java
• Go to CCleaner, click Tools and go to Startup and disable apps from Windows, unnecessary, IE – all, Context menu – all, Scheduled Tasks – all
• Restart the PC. This is to boot Windows 8 Faster.

So, after doing some testing and doing what was suggested by the answers above, I also uninstalled the antivirus that shipped with my notebook (Norton Security), replacing with another software, and the issue seems to be gone. I will need to test what happens when new updates are installed, but for now it is rebooting properly and after disabling IntelliMemory service, it is also faster to shutdown and startup.