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Your Windows 10 PC will soon be 'junk' - users told to resist Microsoft deadline
(www.express.co.uk)
This is a most excellent place for technology news and articles.
Don't shutdown the VM. Instead, use shutdown -> save button in the virt-manager. Now your VM will launch in seconds next time you want to use it because it'll be resumed from the saved state.
Cries in HDD
Sounds like a great excuse for a bit of a hardware upgrade, SSDs have gotten pretty cheap. You can change your whole computing life for $30-50.