According to many sources this processor has a bad reputation for being slow. And it does so, because I have one over here with Windows 10 on it, 4GB of ram, Windows installed on a 120GB Adata SU650 ssd, and even using a ram-disk of 1GB to put the Windows temp files in, but still the thing is as slow as hell. When I open Firefox, it takes 10 seconds for the start page (Google.nl) to load. WTF????? I know this has nothing to do with my internet connection, because on my main pc the internet is blazing fast (Connection is 250Mbit/s down and 25Mbit/s up with an average ping of 15ms), and all cables are cat 6, and the few switched I use are also 1Gbit switches. So the network is solely a Gigabit network. Still I want to use this pc, but I am thinking about what OS would be better? I am totally NOT experienced in non-Windows OS-es but from what I can tell it seems I have little choice. Also the question is, can this system even run Adobe Photoshop and Illustrator? Reason for this is, because my girlfriend from Mexico will be visiting me in a few months (I visited her in Mexico already in January) and I like her to have a fast pc, but without breaking the bank. She likes working with these programs, although they were also slow on her Apple Mac machine. I have tried to work with that machine, but MacOS is so clumsy for me, and that system was far from fast. So, in short, which OS would be best for a Pentium D, running on 3,2Ghz with 4GB of memory, a GTS 450 graphic card, attached to a 27" IPS 1080p monitor, and can run Adobe Photoshop?