It’s that time again. This month there are eleven updates from Microsoft, with four of them flagged as Critical, affecting Windows, Internet Explorer, Office and .NET.

Adobe has once again come along for the monthly festivities, today releasing a new version of Flash. Version 17.0.0.169 fixes at least fourteen vulnerabilities in Flash, including one for which exploits have been observed in the wild.

So, time to get busy updating your systems… especially where you’re using Flash in a web browser.

Update 2015Apr19: One of this month’s Windows updates is causing problems for people running Oracle VirtualBox, a popular emulator. The problematic update is KB3045999, also referred to as MS15-038. There’s no word yet from Oracle or Microsoft regarding a fix. Uninstalling the update appears to work, but this is obviously a temporary solution.