If you're sill running on a beta version of Vista, you have
less than a month to decide what to do 
. But it seems that confusion reigns:
Microsoft Corp. has begun reminding millions of testers of Windows Vista’s beta and release candidate (RC) previews that their trial runs end on June 1.
Cori Hartje, director of Microsoft’s antipiracy efforts, became the first company executive to note the impending deadline. “As a reminder to those that helped with Windows Vista beta testing, the beta installations are set to expire at the end of May 2007,” said Hartje in a Q&A that Microsoft posted March 30 on its public relations Web site. “So customers need to decide if they want to move to Windows Vista or back to Windows XP if they have test versions of Windows Vista on their PCs.”
Details on how best to do that, however, are scant. Despite repeated requests to clarify the exact procedure beta and RC users need to take — and whether Microsoft will provide either guidance or offer a discount to testers — the company declined to spell out its plans.