For system administrators who have felt under the gun in recent months as Microsoft patched record numbers of critical security bugs in its products, January should be a skate.

That's because next Tuesday -- the second Tuesday of the month, also known as "Patch Tuesday," the day Microsoft (NASDAQ: MSFT) issues most of its patches for the month -- only has one patch for a single bug. And that bug is only really dangerous to those running the oldest supported version of the Windows operating system.

In contrast, several recent Patch Tuesday drops fixed record numbers of critical security bugs in Microsoft products.

Additionally, Tuesday's single patch is rated critical -- the highest level of Microsoft's four-tier security threat severity scale -- only for Windows 2000 Service Pack 4 (SP4).

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