Any reason for not using TuneUp? I only use it for weekly maintenance in my gaming PC, such as deleting broken shortcuts, cleaning the registry, etc. I generally don't use this kind of software, as you can see I don't have an anti virus installed. However, I don't have enough time to do those tasks manually anymore, and yes, I'm willing to waste a bit of boot time and RAM for this. Most of my work is done through my Linux desktop, this desktop is for gaming only. Thus very few applications are installed. By ngen do you mean ngen from .NET Framework? And if yes what's correct command line for CCC? C:\Windows\Microsoft.NET\Framework64\v4.0.30319>ngen install Microsoft ® CLR Native Image Generator - Version 4.0.30319.1 Copyright © Microsoft Corporation. All rights reserved. Error: You must specify an assembly to install.