INTERESTING INFO ABOUT WINDOWS!!!

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INTERESTING INFO ABOUT WINDOWS!!!

Post by Marun on Thu Jun 19, 2008 12:26 pm

DO you know about this???

Will Windows work continuously for more than 49.7 days?

Here is a bit of information, which may surprise you all. Windows crashes automatically if you don't switch off the machine for 49.7 Days. Microsoft accepts this. Do you know why?

In Windows the Virtual Machine Manager (here after referred as VMM) is responsible for creation, execution, monitoring and termination of virtual machines. This VMM, which is a 32 bit, protected mode operating system entity, provides a number of system services at chip level. One of these services is "Get_System_Time". This particular service loads the EAX register with the time in milliseconds since Windows started on that machine. This service is accurate to 1 ms. EAX is a 32 bit register in Intel 386 Processor onwards.

So the maximum number of milliseconds it can hold is
(232)-1 = 4294967295 milliseconds = 4294967.295 seconds = 71582.79 minutes = 1193 hours = 49.7 days.

So after 49.7 days the EAX resets to zero. Most of the Drivers use this Time Service to keep track of the Timeout of various services they provide. So after 49.7 days the drivers cannot use the Get_System_Time function of VMM and they crash taking the OS along with.

Please check this knowledge base article 216641:

http://support.microsoft.com/kb/216641/EN-US/ Twisted Evil
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Re: INTERESTING INFO ABOUT WINDOWS!!!

Post by Nitari on Thu Jun 19, 2008 2:27 pm

49.7 days is lot ....
my extreme abuse of my computer is 48 hrs Razz

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Re: INTERESTING INFO ABOUT WINDOWS!!!

Post by Marun on Thu Jun 19, 2008 5:28 pm

Nitari wrote:49.7 days is lot ....
my extreme abuse of my computer is 48 hrs Razz

Mine is 120Hrs = 5days... heheheh.. no way for crash!!! Wink


Last edited by Marun on Sun Jun 22, 2008 9:25 am; edited 1 time in total
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Re: INTERESTING INFO ABOUT WINDOWS!!!

Post by Rahul on Thu Jun 19, 2008 5:40 pm

Mine was 6 days no crash
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Re: INTERESTING INFO ABOUT WINDOWS!!!

Post by dishant on Sat Jun 28, 2008 6:49 pm

i let it run for more than a month but not to the deadline, so i'm happy .....ad great info thanks
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