Q -- "...and now I know I only have 3 options...
1- install linux inside windows
2- keep my vista and dont install linux
3-remove my vista and only install linux
so now I ask you to tell me witch option is better and why....
I have a little question too... if I install a linux inside windows will it be secure and safe in the internet as its normal installation?so now I ask you to tell me witch option is better and why....
I used microsoft operating systems since DOS 2.0 and Windows 3.11, and I have tasted all editions thereafter until Server 2003: modesty aside I have had everything that the redmond boys have invented FOR SALE. The bottom line in every sort of comparison made by the many people with equal experience always boil down to "High Cost v. Free", "Proprietor-support v. Worldwide Community", "Turtle-speed v. Hi-Speed", "Blue-screen-of-D v. Stability", "Copyright Limitations v. Copy-left Freedom" and "Capitalism v. Social-cooperation" to which criteria Linux always wins to a substantial margin. [We are not yet counting the threats of virus and security where microsoft systems are a proven easy victims.]
However, in one comparison, "Ease of Use" here microsoft products like your Vista wins over Linux. Under Linux the learning curve is very stiff and high: the user must read a tutorial because in most cases he has to do it by his own: "freedom of use is not without cost because mental action is highly involved." Although in the end the advantage inures to the user himself who has in a great leap advanced in computing knowledge. In other words, ease of use saves much mental effort and time but it contributes to computing knowledge less, while the basic challenge in Linux will greatly make the user capable and knowledgeable.
Another aspect Windows claims an advantage over Linux is "New Hardware Compatibility" which, I think this not important. You don't NEED to buy new machine EVERY YEAR. Parallel to this is the case of "winmodems" where modem manufacturers don't support open-source, consequence is, it can hardly be ported to linux. However, in the end, it is the hardware maker who will lose, because linux users will not buy winmodems, there are linux-modems to choose.
There are better comparison sites for you to read first, use google to enlighten you before making decision.
If you go for the 3rd option above you'll have no regrets. But if you have no time to learn basic linux then go for the 2nd option. I will not advise you to run linux over windows.
I hope this helps.