Computerworld reports that Microsoft has blocked a popular work-around that let users boot directly to the Windows 8 desktop

"Microsoft made some changes to Windows that prevent the .scf hack from working correctly," said Rafael Rivera in an email reply to questions. Rivera blogs at WithinWindows.com and along with Paul Thurrott, is the co-author of Windows 8 Secrets, a book slated for release next month.

The ".scf hack" Rivera referred to was first disclosed in April, and allowed users of Windows 8 Consumer Preview to circumvent the tile-based Start screen and automatically shift to the familiar desktop after logging on.

Well-known ZDNet blogger Mary Jo Foley first reported Rivera's conclusions earlier Monday. She also said other hacks, including some that restore the Start button to Windows 8, have been blocked.

  Microsoft blocks Windows 8 Start button, boot-to-desktop hacks