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Help, laptop fan randomly gets really loud watch

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    It started happening after I installed Windows 10 (not sure if this can cause a hardware problem though).
    Most of the time the fan is working nice and silent, but every once in a while I'll open the laptop's lid and it will immediately get extremely loud (freaked out the first time it happened, it's really quite loud).
    Shutting down the laptop stops the fan obviously and when I power it back on it's again fine and silent for a while but eventually the same problem happens and I have to restart the laptop again.
    The laptop is never even close to overheated. CPU seemed fine when I checked while it was running silently. I still have to check if the loud fan syndrome is associated with a surge in CPU, but I doubt this is the case. Why would there randomly be a surge in CPU after I open the lid?
    Could reverting back to Windows 8 fix this at all? Any other advice?
    Thanks a lot
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    Assuming this is the normal sound your fan makes it's related to the temperature of the components. Generally the fan will be quiet (or completely off) under normal load and kick in when the temperature starts rising. What you're suggesting sounds completely normal. You're using the laptop for a while and it starts to heat up. So the fan kicks in. You shut the lid and it goes to sleep, hence turning the fan off. Open the lid, components are still hot so the fan ramps back up to cool them down.

    In general laptop fans are set to react to the temperature of the laptop. If it isn't hot they'll run slowly or turn off completely. If it is hot they'll power up. It sounds less like a problem and more like the intended feature.

    Since fan noise is affected by software this isn't likely to be a hardware problem. In the event your laptop fan is kicking in more often now that you've upgraded to Windows 10 it's possible the temperature/fan speed curve has been changed. You may be able to find settings in the BIOS or with vendor specific software (can't guarantee which since you didn't specify the laptop) to adjust the fan curve.

    It's also worth noting that the fan will sound quite loud when you power it on. A lot of laptops will spin up their fans when you turn them on or wake them out to ensure they're working properly. It's part of their boot testing. It's perfectly normal for the fan to be starting up in these scenarios. It's worth checking what your "close lid" settings are. Windows 10 likes to revert settings and as a result you may have been putting the laptop to sleep without realising it, hence the fan noise when you open the lid.

    If you're able to give more details (laptop model, what you're doing when this happens, etc.) I can give a more specific answer.
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    Everything above

    Plus, Win 10 requires a load more CPU power than Win 8 does. Reverting back to Win 8 can reduce the amount of times the fan needs to be on for your laptop, if it's an old or low powered one that works fine with win 8 but struggles on 10
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    (Original post by Another)
    Everything above

    Plus, Win 10 requires a load more CPU power than Win 8 does. Reverting back to Win 8 can reduce the amount of times the fan needs to be on for your laptop, if it's an old or low powered one that works fine with win 8 but struggles on 10
    I really wouldnt say it uses much more processing power. The figure you see in Task Manager will be largely inaccurate due to some of the inbuilt processes designed to make the computer faster (which will show a CPU usage that fluctuates to quite a high degree). If you are truly experiencing much higher CPU load, I'd reckon its not due to the OS
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    Thanks for the reply. The laptop is Toshiba Satellite PRO R50-B-122. I'm not inclined to think the noise is normal because I've had the laptop for like 6 months and it only started occurring recently.
    I guess I did notice the fan is slightly louder on start up, but when this particular issue happens it really sounds like a full scale desk fan. It was never even close to this before.
    I'm pretty sure I've always had it set up so that closing the lid puts it to sleep. Isn't this standard? Surely I don't want it running at full power when I'm not using it?
    I'm not doing anything in particular when it happens. I don't have any programs running except the ones that are open in the background all the time (antivirus and so on). I just close the lid when I'm done and when I want to use it again this will happen. Not every time, but relatively often.
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    Sire its been said, but almost certainly it just needs cleaning to stop it overheating.
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    OP, it is struggling you will either have to revert back to windows 8 or buy a newer laptop to solve the issue
    or get it rebuilt with an upgraded cpu (not worth it in most cases but some people do have an attachment to a computer of lots of files to move if replacing so pay for the upgrade)
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    (Original post by IWMTom)
    I really wouldnt say it uses much more processing power. The figure you see in Task Manager will be largely inaccurate due to some of the inbuilt processes designed to make the computer faster (which will show a CPU usage that fluctuates to quite a high degree). If you are truly experiencing much higher CPU load, I'd reckon its not due to the OS
    Personally on my old machine, Windows 8 worked brilliantly but as soon as I made the move to 10 everything started getting sluggish, even the OS. Many other people had problems with Windows lagging on the upgrade between 8 and 10 :/

    OP if you open your laptop in safe mode (with no background or startup programs), does the fan still kick in?
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    (Original post by Another)
    Personally on my old machine, Windows 8 worked brilliantly but as soon as I made the move to 10 everything started getting sluggish, even the OS. Many other people had problems with Windows lagging on the upgrade between 8 and 10 :/

    OP if you open your laptop in safe mode (with no background or startup programs), does the fan still kick in?
    As with any OS upgrade, a fresh installation is the only way to get the best speeds! Personally though, I updated it (albeit via a disk rather than download) and saw an improvement in performance rather than the alternative.
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    (Original post by monk1324)
    Thanks for the reply. The laptop is Toshiba Satellite PRO R50-B-122. I'm not inclined to think the noise is normal because I've had the laptop for like 6 months and it only started occurring recently.
    I guess I did notice the fan is slightly louder on start up, but when this particular issue happens it really sounds like a full scale desk fan. It was never even close to this before.
    I'm pretty sure I've always had it set up so that closing the lid puts it to sleep. Isn't this standard? Surely I don't want it running at full power when I'm not using it?
    I'm not doing anything in particular when it happens. I don't have any programs running except the ones that are open in the background all the time (antivirus and so on). I just close the lid when I'm done and when I want to use it again this will happen. Not every time, but relatively often.
    Firstly I found a bunch of potential stuff you may want to try. No guarantee any of it is related but you may see something that helps:

    http://www.tenforums.com/performance...dows-10-a.html

    I wouldn't say that just because it hasn't happened before you can assume it isn't normal noise. What it sounds like is that something is forcing the fan to run at full speed (or much faster than normal) and you've just never experienced it before. After all there's little reason for a laptop fan to run at super high speeds unless you're actually doing something intensive. And from the sounds of it you won't have been doing anything so intensive that the fan will blast at full speed.

    You'd think that sleep settings are standard but each laptop treats it differently. And the Windows 10 updates are a shambles for updating your settings without telling you. I set my laptop to not require a password on startup or when I opened the lid but after one of the latest Win 10 updates it started requesting a password whenever I opened it up. The sleep settings I'd set up had been changed. So it's worth looking into, even if just to confirm your settings are what you want them to be.

    If it's happening sporadically and not every time that makes it a little more difficult to pinpoint. If the fan isn't kicking in consistently I want to say it's down to temperature since that's the only factor that actually changing and should affect the fan. Which takes me back to my original theory that the Windows 10 update has done something odd to the fan speed curve.

    The only other thing (which I gleamed from the link posted above) is that there's a process (potentially Cortana) running and eating up your resources. That's what's causing the temperature to increase and thus cause the fan to kick in. You wouldn't notice it since Cortana is in the background. But this is just a theory.
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    Thanks for the replies everyone. Funnily reverting to Windows 8 seems to have fixed the issue.
 
 
 
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