Health and Human Services Secretary Sylvia Burwell gestures while answering a reporters question following her tour of the Greater Prince William Community Health Center, Evergreen Terrace Site, in Manassas, Va., Saturday, Nov. 15, 2014. The second sign-up season under President Barack Obama's health overhaul starts Saturday with hopes that consumers will have a positive experience this time and fears that entrenched political opposition and renewed legal challenges may yet collapse the program. (AP Photo/Cliff Owen)

The Obama administration says the health care website is working well as a crucial second sign-up season for President Barack Obama's health overhaul gears up.

Health and Human Services Secretary Sylvia Burwell says 100,000 people have submitted new applications this weekend via Healthcare.gov. That's a big difference from last year, when only a handful of customers could get past frozen computer on the first enrollment day.

Burwell also tells NBC's "Meet the Press" that a half-million people who already have coverage through the program were able to log into their accounts. There were reports Saturday that some returning customers had problems.

Obama says there's been a big improvement overall and that HealthCare.gov "works really well now."

With Congress fully under Republican control, the administration can't afford another website meltdown.