Satellite U500-11C fan sometimes doesn't start running Win 7 64bit

Hello,
I have two Toshiba Satellite U500-11C under Windows 7 Home Premium 64 bits. Sometimes, after a new Windows start, fans don't start and just run a few seconds sometimes. When this happens, the CPU temperature gets very hot (don't know exactly how much). I've found a way to get back to a normal behavious by just unplugging the AC cable and replug it just one second or two after.
Must two laptops have the latest Bios and drivers from Toshiba. In some way, it is the same behavious as under Linux.
With those experiences, I come to think that Toshiba Laptop are not well managing correctly ACPI Fans and tempartures. Is it really a fatality ??
Hope this feedback can help...

Hello Tonny,
Yes, I think like you that when I have this fan issue, it means that BIOS feature doesn't work correclty on regulating temperature with variable fan speeds, and finally, it is the overheating security which makes the job. When using Linux, I've seen that ACPI temperature levels are not correctly defined or published by the BIOS : Fans are not expected to be launched before the CPU burns at more than 108C !
What surprises me is that this is a bug in the BIOS that has been living here since the first BIOS versions, and that my researches on various forums show that this Satellite U500-11C is not the only one to have fan issues from Toshiba Laptops on both Linux and Windows.
That said, I don't understand what Toshiba tries to do when making special BIOS versions, instead of using more standard ones with correct ACPI functions programmed inside. Other laptop manufacturers are more "standard" in their approach, and give users more satisfaction on everyday use.
In the same idea, I've finally removed most of Toshiba applications on one of my two Satellite U500-11C and it runs much better : lower power consumption, less heating, more responsiveness, ...
Hope this helps...

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