It looks like users of the Windows 10 Technical Preview are getting a new hotfix today. Announced by Gabriel Aul on Twitter, this one addresses a second high frequency Explorer.exe crash. If you're experiencing the crash, be sure to check out the Windows Update servers to grab the patch.
One more hotfix today for #WindowsInsiders addressing a second high frequency explorer.exe crash. Replicating to WU servers now.
Source: Gabriel Aul