LENOVO M58P my fan runs at a very high speed it doesn't slow down.I try cleaning it ,changing it ,changing the CPU ,reseting the bios all seem not to work.

Fans, mainly the CPU fan, have a speed control which slows the fan down. This is usually controlled by the BIOS. The speed is based on temperature of the CPU. If it's cool with little load the CPU fan will run very slowly and you won't be able to hear it. On startup all fans ramp up to 100% until the BIOS takes over and slows the fan down.

change the fan ASAP, since the zooming noise and the slow performance will affect even the processor and you might end up replacing the processor as well if it persists. So get the fan ASAP and problem will be solved.

sure it does all PCs do that, full of lint, all do.
we clean it.
it has fan and vents
all fans all vents and heatsinks must breath or it overheats.
all do that not cleaned, drive your car around with the radiator blocked, boom.
all PCs run slow overheated, by DESIGN.
this slow down , reduces heat, and saves CPU/GPU burn up.
just like my chevy, truck, it cuts cylinders to save the engine.
same deal both.

same deal; same reasons.

http://www.pcdied.com/overheated.html

old post.
odd symptoms.
the OP never once told the full story
what works good and not.
XP runs? surely it can, 0.4% 2016 run XP world wide and way less now 2018, due to virus magnet status.
do not run XP , and the fan is not XP job.
BIOS runs the fans.
if the PC runs at 56C or so and the fans slow that is normal
The bios only speeds up facts at start,
the slows them and monitors CPU heat and GPU heat
if they rise too high the fans spin up.
this is how all PC run
my fancy desktop has 600rpm fans right now, due to cool running CPU. 4 pin fans can do that magic.

The reason for the fast spin up is easy to learn turned on fresh.
the PC ASSUMES the chip are hot.
say PC parked in a trunk at 120F
the you go indoors and turn it on
so to be safe, it runs them fast (like at BIOS machine code instruction 1 or first. it spins them up then watches CPU temps live. this can take a few seconds to do a scan, see a TREND
if the trend show low, temps, it then uses a PWM fan table in the BIOS, and set the fan speed off that hard coded table)
get that?
now say PC was hot turned on then it slows only if fast fans speeds can lower the CPU temp
then rule 2 and 3 on BIOS CPU temps
if bios does not like say 80C it can turn itself off.
if failing to do that, say fan is dead, learn that ALL CPUs from P4 up
can turn them selves off they HALT.
ALL AMD and intel CPU do that.
ok?

and did you really clean it
is the RAD clean.?

http://www.pcdied.com/overheated.html

Keeping the fans clean is especially important, because the fans blow out hot air and bring in fresh air to cool down the laptop.

Fans attract dust, however, which can slow them down, resulting in a hot laptop.

If the laptop overheats, vital parts can cease functioning altogether.

Consequently, keeping your laptop's fans clean is crucial.

The fan speed on a laptop can determine how it operates consistently and reliably.

You can slow it down or speed it up, based on the circumstances.

For instance, slowing down the fan speed may be useful in reserving processes or during a prolonged slow time.

Speeding it up is beneficial in keeping the laptop cool during ongoing use or high-traffic times. For the long term, find a happy medium for regular use, so you won't "psyche" out your computer by constantly adjusting the settings.

Click on the Start menu and select "Control Panel." Next, choose "Performance and Maintenance."

Select "Power Saver."

To slow the fan speed, locate the slider next to "CPU Processing Speed" and slide it down by moving across to the left.

To speed up the fan, move the slider to the right.

Press "Apply" and then "OK," if prompted.

Hope this helps

Make sure that cpu fans are running normally. Go to BIOS (generally with F2 on intel motherboards), and there will be information about cpu temperature, also fan speed (in RPM). If fan speed is 0 or very low problem is in cpu fan. (connection problem might be). If cpu fan speed is normal (high value) and cpu temperature is high, I will suggest you to open your PC case (or notebook) and see whether cpu fan is dirty or not. This is very common problem. If so, clean it.

your fan has nothing to do with your computer slowing down.
your fan goes on when a threshold is reach in the cpu temperature or another component's temperature being cooled. the question is what's is causing your cpu or your chipset to work harder than usual causing your system to seem to be sluggish??

the simple answer is malware and need for a clean up and tune up

I suggest you do the following:

1. get an air can, open the case and without touching anything and watching for ESD, dust off your system free.

2. close the case and turn your computer on

3. update your antivirus and run deep scans

4. get all critical updates for your system from windows update

5. download, spybot search and destroy, malwarebytes, superantispyware, and a square free edition, update them and run deep scans.

6. defrag your hard drive

7. to improve perforamance make sure you update or upgrade memory

good luck!

Change the setting in the BIOS menu. reboot your computer.. when you see the dell logo.. press F1 (or F2 if F1 doesn't work) button until you see the BIOS screen. Check for fan options and change it

it's actually good that your cpu fan is runing at it's full speed. Usually only the manufacturer issues firmwares. Lookforward Gigabyte for the update. thanx

fan motor run for five minute then get hot and shut down