An anonymous reader writes, "Microsoft insists that its Windows Genuine Advantage anti-piracy program is nearly flawless. But that's not the impression you get when you visit the company's WGA Validation Problems forum. Ed Bott at ZDNet went through 137 problem reports submitted there during a two-week period, each one accompanied by the output from the official Microsoft diagnostic utility, and found that 42% of the people reporting problems were actually running Genuine software. From the article: 'One large group consists of people who, for some unexplained reason, were displaying cryptographic errors related to digital signatures. The problem is so common, in fact, that Microsoft representatives have a canned response they paste into replies to forum visitors who appear to be showing false positives caused by these errors.' In a related story, the first WGA errors from Windows Vista and Office 2007 have appeared in the wild."