Table 1. Shared number of vulnerabilities and percentages.
| A/B | 2K(191) | XP(113) | Vista(49) | Seven(8) |
| 2K2000-02-17 | 493100% | 30060.85% | 9920.08% | 285.67% |
| XP2001-08-24 | 30063.29% | 474100% | 15833.33% | 5812.23% |
| Vista2006-11-08 | 9944.39% | 15870.85% | 223100% | 7232.28% |
| Seven2009-07-22 | 2835% | 5872.5% | 7290% | 80100% |