DO you know about this?
Will Windows or any other O.S.
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
Source: HMRITM Forums