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After a fresh Windows reinstall I discovered that my HKEY_CURRENT_USER key takes only 4MB vs 33MB it took in the old Windows (before reinstall).
I have found out that a Chinese mouse driver (VicTsing T1 Gaming mouse) I used for a few days stored a huge PDF file in registry as binary data to:
[HKEY_CURRENT_USER\Software\T1gmmouse]
"ProfileSettingGroup.pfd"=hex:00 etc etc etc
Probably there are other similar horrors there to fill up the rest of the space, up to 30MB.
So, how do I find out the size of each registry key, or better, the top 30 registry keys by size?
For example, if you press Shift+Alt+Enter in Total Commander, it will show the size of each folder. Maybe there is something similar but for registry?
Or maybe there is a Windows script that could export each individual registry key to a reg file, to the reg files will be sorted later by size?
Best I can come up with is using TreeSize free, and selecting the folder %SystemRoot%\System32\Config as your scan path. – spikey_richie – 2017-11-13T11:33:15.900
@spikey_richie- access is denied for that folder. and there are other issues. – Ultralisk – 2017-11-13T20:44:54.327