Basically no boot device could be 1 of three things listed below.
1. You have connected an incorrect external device and the system responds to boot from this however no operating system is available. Hence the error. What to do : You have disconnect, reset and select the correct bootable device. 2. You have a faulty hardware specifically your bootable harddisk, corrupted or malfunctioning. You have to reformat and correct the bios installed on the disk. 3. You have not selected correct bootable device. - Select the correct harddisk, if you have partition, be sure to select the one with the Operating system is installed to.
putting your hands one the wheel, putting the car in gear, putting your foot on the brakes when you need to, and watch for cars when you're driving. hope it helps
The best scenario is when a program suffers from frequent
page faults. In the situations when a kernel thread experiences a page fault,
another kernel thread can be switched in; something a single-threaded process
will not be capable of doing. Another best circumstance is when a program has
to wait for other systems events.
