Right now on my laptop there is Windows 8 and Linux Ubuntu dual booted. I'm just curious. I want to know is there any limitation for having more than certain number of operating systems. Is there maybe a possibility to damage something if more OS-es are installed? 

I own a PS3 and I would like to upgrade to a PS4. Will I have to buy all the parts including the controllers? Sony announced that the new controller would have a highly sensitive axis Centre that with a new light bar. However, will the PS recognize my PS3 controllers? How will PS3 users access the Gaikai Inc cloud technology, if it will be made available?
 

How does the Samsung Gear VR work? If I decide to get one, will I need professional to help me set it up? To use it, do I need any software installed or will it just run on its own? Finally, does it need a cable to operate or does it have a rechargeable battery? If it has a battery, how long does it last?

I have seen a recent update that the new Raspberry Pi 2 will help children and even adults learn programing easily. If you know about that device, how does it teach people to program? What changes have been made to the new model’s hardware to ensure that it helps people master programming easily? Is it cross platform? If not, what operating systems does it support?

Apart from changes in interface, I pretty much find windows 10 to be like windows 8. Anyway, I think maybe I have bypassed the complex upgrades made to underlying apps. Is there anyone who can clearly explain to me the major changes that Windows 10 has over windows 8? Which one of them would you recommend and why?

I am considering buying a 10-inch tablet with my main options being either Samsung or Apple. If you are knowledgeable in these two, which one can you advise me to buy? Does the iOS application store have many useful apps like Google play store? How does the iPad hardware compare to the Samsung Tab? 

I bought the Epson expression xp-410 printer recently. What cables do I need to connect it to the computer? What does the bi-directional and IEEE cables represent? What are their functions, which is better than the other is and why? Finally, does any of these come with a printer or they both have to be purchased?

I am not able to receive email on my Samsung Galaxy S4, which runs on Android 4.4.4. I did a hardware reset and now I can only add an account but I cannot read mail because it does not sync. I am running exchange 2012 and the log in page 365. I have even tried checking with my mail account but it does not recognize the device to be connected. Can you help me please?

With the new ARM Cortex A72 processor nearing its release, I would wish to know quite some things about it. First, as spped is integral in new devices, how has the new Cortex processor been adapted to handle speed needs? Which phones will be the first to have this processor? How does the Cortex A72 differ from the A57 or A15?

I have purchased a Google Nexus phone running on Android Kitkat  and whenever I try installing the Google + app, I get a 505 Unknown application error. What steps can I use to solve the problem? Since the issue occurs frequently, how do I tell if it is an android problem or a defect with Google Nexus phone models?