Happy New Year !
I upgraded a W7 - 2 - W10. All good !
Running some tests; the Power Eraser coughed up x3 Registry Keys, at risk.
Taking a lead from the 'Data Tab', it indicates 'System32'.
Looking in 'System 32', the 'exe files' don't exist.
So, best way forward.
1. Let 'Power Eraser', 'Fix Now' ?
2. Manually, erase the 'Registry Entries' ?
There are a good few remnants left in W10.
Although the upgrade was free; software, no longer supported, is a passive issue.
GeekUninstallerFree, is user friendly. Where as RevoUninstallerFree, is to be used with caution.