Almost 36 hours after a software problem caused widespread outages in eBay Inc.'s Skype service, engineers continue to work to fully restore this extremely popular Internet telephony and instant messaging service, while many business users deal with work disruptions.

Although steady progress was made throughout the day Friday, the problem, which has affected millions of Skype users, hasn't been fully fixed,

At midnight GMT Friday, an official provided the latest update on Skype's Heartbeat blog, saying that the sign-on problems have been resolved, but that the instant messaging presence and chat may take a few more hours to be fully operational for all.

"If you are one of the minority who may still be experiencing problems, please be patient. You do not need to adjust or restart your computer. Skype will start working for you very soon," wrote Villu Arak [cq]. "We will issue a further update when we know that Skype is functioning normally, or if there is further material news."

"The outage has had quite a profound effect on my working day, and has meant spending time setting up other chat clients and networking with colleagues via alternative means," Michael Pick, a freelance blogger and social media consultant, wrote in an e-mail interview Friday.