I have been using Windows 7 for quite some time but I have since switched to Linux, precisely Ubuntu 14. There is a huge difference between the two and although they both function perfectly, there are a couple of things that I need to know. While in windows, I could search easily for the software installed by using the everything.exe tool. I want to do the same in Linux but I cannot. Please help

I have a Linux kernel that I have installed a windows virtual machine, Is oit possible to install another virtual machine? What would I need and how can I switch, from one virtual to another? would I need another set of keyboard and mouse and is it possible to fun both the machines simultaneously?

I have few data that are in the unix executable files I try to open that data but was unable to do that. I tried a few software to open the data and I was unable to that. I need help to open the data. Also can I convert it to its original form or not.

'There are many Linux Distros'. I've seen this sentence many times on the webpages but what actually is a distro? I have tried to search it on dictionary but I didn't find it. Is it a software distribution or package. Anyways, I want to be clear how distro got its name. 

I have had my computer taken over by malware. So I am wanting to wipe it all out and start over. I am thinking about going with linux this time. But I am not sure is it safer or is it easier to get hacked with it? Ways to protect your machine with linux?

How do I safely delete all files, on Ubuntu Linux, with a specific extension (e.g. .bak) from current directory and all subfolders simply by using one command-line? I'm afraid to use rm because I used it wrong once and now I need advice. Is it possible to perform such action?

I think that cinelerra is the best free video-editing open-source software available. It is complicated but it has very nice tools. The problem is that I have to load mpeg4 files but it never happens. It works fine on other formats. I've tried to convert mpeg4 to other formats but its quality just doesn't satisfies me. Can someone help me how to tweak/fix it?

I downloaded the .iso file of Zorin OS 8 from the home page of the OS. After that, I burned the files to a blank DVD using Windows Disc Image Burner. But when I try to boot Zorin OS from DVD then a black screen appears which reads Kernal Panic 0000008.X and else. What can I do to fix this?

I have root access to a Linux terminal and wanted to know how i would change the root name to another name, is this possible? Would this damage the system? What characters are used in the names and how long does this effect? Do i have to restart the machine?

I have a windows and I loved the interface, I had to migrate to Linux and im new here. I heard of Wine for windows system integration. I downloaded this but have no idea how to operate this. How do I get to install a file meant for windows using wine? Where is the actual installation in Linux or in the wine interface?