I had used the following OS (Operating Systems on Desktop PC )
1. DOS (The first operating system ) It is very much used for specially Hardware 2. WIN-3.1 (Just with few features word Editor + some graphics + DOS etc) 3. WIN-95 (The upper version of Win-3.1 ) 4. WIN-98 ( This window was very much stable and rule for a long time, I love this OS at that time) 5. WIN ME (Millennium Edition used for 3,4 months ) 6. WIN-XP SP3 ( This OS is still very powerful and we are using it King of its time ) 7. WIN-VISTA ( Good OS at the time of Release but has some issues so I use it and Return to XP) 8. WIN-7 ( This one I also like most very Reliable OS and feature Rich ) 9. WIN-8 ( Good but don't prefer due to some unwanted features just occupied the HDD space )
So stick with Window-7 and last but not the least I also have LINUX- UBUNTU-10+ version
I used all the OS since 1995, starting with DOS, DBase, Lotus . My own computer was with windows 95. Tried all Windows OS, also Ubantu, Fedoro. Now with Windows 8 in Laptop and Windows 7 in desktop.