Operating System (OS)
You can select My Computer icon and press Alt + Enter to

Delete it from desktop permanently
Open it in Explorer mode
Open System Properties dialog box
Pin it on Start menu

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Operating System (OS)
A critical region is

a program segment that has not been proved bug-free
a program segment that often causes unexpected system crashes
none is the above
a program segment where shared resources are accessed
one which is enclosed by a pair of P and V operations on semaphores

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