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Albert WidjajaFlag for Australia

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How to quickly delete large chunks of unused Registry entries from Windows Terminal Server 2003 R2 ?

Hi People,

I got very annoying problem where people having very long wait to be able to login to the old legacy Windows Server 2003 R2 terminal server (which was converted from physical to Virtual).

under normal circumstances, it took more than 30 minutes to login to the point that I must reboot the server daily overnight to kick off some user old session.

My culprit based on this article: http://itinfrasol.blogspot.com.au/2012/06/users-are-facing-delay-in-logging-in-to.html

is to delete the following registry entries:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software\Hewlett-Packard
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\RefHive\Hewlett-Packard
HKU\.DEFAULT\Software\Hewlett-Packard

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but somehow there is one very big registry entries which takes about 1.5 GB+ when exported as .REG file before i remove the registry.

so my question is that how can I safely and quickly delete the following old printers registry entry:

HKU\.DEFAULT\Software\SHARP

which is always crashing the regedit software when I tried to delete the entryy from the top location even from Safe mode ?
going manually one by one to each subkeys is way to ridiculous and time consuming.

Any help and suggestion to delete the large excessive registry entries would be greatly appreciated.
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Thanks !