thanks for your answer. At bios level I can only put on or off the processor ECO mode. Tried On and OFF and not change in the turbo boost. Another problem I found was that I can't change the screen brightness.
Finally the only solution I found is to make a system restore to a point before loading the new Intel drivers.
Now everything works OK.
I think that Samsung drivers have a "some" difference from the original Intel drivers.
Thanks anyway and good bye.
I also have this problem on same ultrabook with yours (samsung ultrabook series 5 with core i5-3337U@1.8 Mhz processor).
I did factory reset few days ago and then updated all samsung software (because of hdd replacement).
Then, I notice that cpu clock on task manager stay in 1,8GHz and a notification about Virtualization (if I am not mistaken) is not supported in this processor while installing a software. I checked Hyper-V in Windows Features dialog box.
- What is name of old samsung application to change cpu clock / eco mode? I still have old samsung' systemsoftware backup. I hope by reinstall it will solve the problem.
- I don't think to do reset to factory setting anymore. I did twice last month TT__TT.
After I reset my samsung ultrabook to factory setting, I did a little troubleshoot and then found the answer.
It is because of << Hyper-V checked (on) >>!!!
In this ultrabook (processor i-5 3337U), if you check Hyper-V feature in Windows Add Features dialog
-- Windows fail to read processor Turbo Boost (I guess). Windows Task Manager will show processor speed is 1,80 GHz all time.
-- This failure will affect to processor fan. The fan will never change it speed to higher speed and make my ultrabook temperature increase.
Next, I tried to check (activate) Hyper-V on my brother Microsoft Surface Pro with i-5 4000U processor. Everything run normal.
So, I can guess that there must be something (bug, error or...) in this (my ultrabook) i-5 3337U processor, don't know it is at processor level or windows level.
need replacement if I want to activate Hyper-V. TT___TT