For Windows 8/10: 1  Move your mouse cursor to the taskbar at the bottom left corner, type âdefragâ in the search box. 2  Click the âDefragment and Optimize Driversâ option. 3  Now select and view current status by clicking âAnalyzeâ check how fragmented your HP hard drive is.  Hit âOptimizeâ to start defragmenting.
Rating Newest Oldest. Best Answer: The characters N/A (sometimes n/a) are an abbreviation that is mainly used in information tables. It stands for one of the following: (a complete list) * Not available: Where there exists a lack of data.
The letters R,Q,N,Z are the names of the set of the numbers, that have specific properties. For instance, N is the letter which designates the set of natural numbers. N = {0 , 1 , 2 , 3 ,............. If the set is N^*, that means that the 0 value does not belong to the set. We could also write as: N^* = N - {0} The letter Z designates the set of integer numbers, which contains positive and negative elements. Z = {... , -n ,.... ,-4 ,-3 ,-2 ,-1 ,0 ,1 ,2 ,3 ,4 ,... ,n, .....} So, the set Z is composed from the elements of N and their opposed. The conclusion would be that N is a subset of Z. Also Z^* = Z-{0}. The letter Q designates the set of rational numbers. The set could be mathematically described as: Q = {m/n / m and n belong to Z, m is not divided by m}.