According to a best practices sheet which the National Security Agency sends out, both Windows 7 and Vista provide substantial security enhancements over earlier Windows workstation operating systems such as XP.
Many of these security features are enabled by default and help prevent common attack vectors, it says. In addition, implementing the 64-bit mode of the OS on a 64-bit hardware platform substantially increases the effort of an adversary to attain a system or root compromise. For any Windows-based OS, verify that Windows Update is configured to provide updates automatically, the leaflet claims.
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