How big is the system disk to install Win7 Ultimate 64-bit system?

1, the official data released by Microsoft is 20GB of hard disk space (note that the official release does not include the space occupied by the patch);

2, analysis of the system disk usage:

a 64-bit win7 operating system, to be installed in the system disk;

b) operating system patches, the more patches will be later;

c) installation of office, QQ and other software required System disk association program also occupies system disk space;

d) Internet disk, software operation, patch upgrade, etc. also need to occupy the system disk space;

e) must be installed in the system disk Program;

3, after the above analysis, 20GB of space is not enough, 64-bit win7 system disk is suitable, small series combined with actual use and network name feedback, 64-bit win7 system disk at least 50G It is recommended to be more than 60G. If you know that there is a need to install the system disk, the program can be increased according to the actual size of the program. If the hard disk is large enough, consider 100G, so that it can run better.