Windows guides
How to Apply a Hyper-V Checkpoint in Windows 10
Restore a Hyper-V virtual machine to an existing checkpoint in Windows 10 and understand the difference between Apply and Create Checkpoint and Apply.
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Windows guides
How Windows 10 Technical Preview Rollback Worked in 2015 (Historical)
A historical explanation of the Windows Rollback boot entry that appeared on some early Windows 10 Technical Preview systems, plus the modern Go back equivalent.
Windows guides
Windows 10 Technical Preview Build 10061: What Changed (Historical)
A historical summary of Windows 10 Technical Preview Build 10061, released to Fast ring Windows Insiders on April 22, 2015.