As a user who does not work for Adobe, I will say that your (laptop ???) computer will never work WELL with Premiere Pro
8 Gig of ram will allow 64bit Windows and PPro to load and run... but not very fast
Your 128 Gig ssd is small and will quickly fill with work and temporary files... see below
An EXAMPLE concerning trying to use only ONE Hard Drive for Video Editing
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You are a music conductor, with a baton that you use to point to various parts of the orchestra... this is like the operating system pointing to various parts of the hard drive to do file housekeeping or to load program segments for various functions
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Now, at the same time and with the same hand... while still using the baton to conduct the orchestra... pick up a bow and play a fiddle... this would be doing something with your video file at the same time as all the other work
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You as a person cannot do both at the same time with the same hand
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A computer is a LITTLE better, in that it can switch from one kind of task to another very quickly... but not quickly enough for EASY video editing
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You need AT LEAST two hard drives (separate drives, never a partition for a "spindle" drive http://forums.adobe.com/thread/650708 for more on partitions) with Windows (or Mac OS) and software on your boot drive, and video files on a 2nd drive so the boot drive is not slowed down by trying to do everything... not even with SSD see # 16 http://forums.adobe.com/thread/1352987
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Do not try to use a USB2 external drive for video editing, the USB2 file transfer speed is too slow
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External eSata or USB3 are both fast enough for video editing... (or Firewire?) http://forums.adobe.com/thread/1117813 - http://ppbm7.com/index.php/tweakers-page/84-disk-setup
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A possibility is this USB3 dock with fan to swap drives http://www.amazon.com/StarTech-SuperSpeed-Docking-Station-Cooling/dp/B0055PL2YI or http://www.newegg.com/Product/Product.aspx?Item=N82E16820147511
Drive C space http://forums.adobe.com/thread/1007934?tstart=0 see reply 4 for the setting that you need to manually change to a different drive... and then delete any old temp files