Solved Windows Defender update

[RobertD]

Each day for the past 10 days I keep getting the same update notice: Important Update; Definition Update for Windows Defender KB915597. The first few times I installed it, but then discovered it was the same one each day. How to stop receiving this? And why is it happening?

 

[UsernameIssues]

KB915597 updates the list of bad things to look for.

If you use Windows Defender OR Microsoft Security Essentials, you should install KB915597 every time it is offered.

 

[RobertD]

It's rather hard to believe that that has to be updated EVERY day?

 

[Brink]

Yep, it's not unusual to have 2-3 Windows Defender definition updates per day.

 

[RobertD]

Thanks for the help. Now I know.

 

[UsernameIssues]

It's rather hard to believe that that has to be updated EVERY day?

Some people check for updates each hour.

Panda's estimate is 225k per day:

Panda Security detects over 225,000 new malware strains per day in the first quarter of the year - MediaCenter Panda Security

Other sources claim more than a 1 million new malware files appear in the wild each day.

There are computers that do nothing but crank out variations on a theme. They try to make an old infection escape detection. That is why heuristics is so important. Sadly, MSE has poor heuristics.