As promised last October, Microsoft has gone through with reclassifying the Windows 10 upgrade as a "recommended" update on Windows Update for Windows 7 and 8.1 users. Microsoft previously said it would aim to reclassify the upgrade from "optional" to "recommended" in early 2016, so the February 1 push makes sense.
Microsoft confirmed the move in a statement to ZDNet:
"As we shared in late October on the Windows Blog, we are committed to making it easy for our Windows 7 and Windows 8.1 customers to upgrade to Windows 10. We updated the upgrade experience today to help our customers, who previously reserved their upgrade, schedule a time for their upgrade to take place."
Now that the upgrade is classified as "recommended," some users who have automatic updates enabled may see the upgrade automatically begin installing. However, users can turn down the option to go through with the upgrade before it is installed. And if you find you accidentally upgraded to Windows 10 and didn't intend to, you have 31 days to roll back to your prior Windows 7 or 8.1 installation.