Microsoft Corp. on Friday defended the redesign of its Windows Live Hotmail e-mail service, which has been blasted by some users, but the company said it would stick with the new interface.

Today, it also urged users who were unable to access their mail to switch to the skeletal mobile version or use a desktop client to reach their Hotmail accounts.

"We can't provide two fast, secure reliable experiences, so we have decided to just keep the new version," said Mike Schackwitz, lead program manager for Hotmail, in an entry on a Microsoft blog on Friday. "However, we will continue to improve the new version, based on many of your comments here, to make it work better for you."

Schackwitz was responding to criticism leveled by hundreds of Hotmail users who had taken the new interface to task in comments left on an earlier blog entry. "We've read all the comments, followed up with some of you, and changed the service as we went," he said. "Since our original announcement, we have read and analyzed several thousand comments, fixed several bugs, and released five updates to the code."

In late September, Microsoft began rolling out a revamped Hotmail that ditched what had been two options: a years-old "classic" interface and a newer "full" interface that was first offered in 2006. Instead, Microsoft merged elements of both in a new look. Schackwitz said that the gradual changeover was nearly completed, contradicting a spokeswoman who last Friday said the company would take "a few more months" to wrap up the transition. "By the end of this week, all Windows Live Hotmail users will be upgraded to the new Hotmail," Schackwitz promised.

Many users haven't been happy about the change and by turns begged and demanded that Microsoft restore the "classic" choice.

"We understand that everyone has different tastes and computer configurations," Schackwitz said. "Although the majority of people in our tests preferred the new look and themes, some people didn't. So, while most of you have seen Hotmail improve, some of you have not, and we apologize for any inconvenience this may have caused you."

That apology didn't stop critics from blasting Microsoft's decision. "If you really think that this new format is great, you will be out on the street soon looking for a job," said an anonymous user in a comment added to Schackwitz's blog this morning. "Yes people have different tastes, but according to the comments I have read they are about 50:1 against the new format."