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To exclude disk(s) at startup take the following steps:
1. Click 'Start' (then click 'Run' in XP), type 'regedit.exe' and press enter:
2. In the registry editor window, navigate to 'HKEY_LOCAL_MACHINE' > 'SOFTWARE' > 'Macrium' > 'Reflect'. Then right click and select 'New' > 'Key'
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