Laptop HDD shows different partition when installed in laptop and connected externally with other PC !!!Why does that bother you?
Most versions of Windows work well with partitioned disks. The common practice is to put stuff that is SELDOM needed onto its own partition.  This can help reduce FRAGMENTATION, is some canes. The partition can be set HIDDEN and read-only.
Many laptop makers provide a 'recovery' partition only used when needed do a clean install of the operating  system.
Are you having any trouble with you laptop?It definitely bothers me. When I connect it externally it shows one partition of 100 GB  and other of 365 GB and when I install same HDD in laptop it shows totally different. One is of 45 GB and other is of only 12 GB. Quote from: jnjani on July 02, 2013, 02:51:10 PM

It definitely bothers me. When I connect it externally it shows one partition of 100 GB  and other of 365 GB and when I install same HDD in laptop it shows totally different. One is of 45 GB and other is of only 12 GB.