My computer wont boot up right i dont know how to fix it or what caused it ?

OK i logged on to my computer one day and i see an icon on my homescreen the icon was internet securty my computer was acting really slow so i shut it down then i turne it back on it said sorry for the inconvince and gave me 4 or 5 options start up windows normally, last successful boot or something, safe mode with control pannel, safe mode, and safe mome with something else. I tried every single one of them and all of them went back to the same thing is there anyway i can fix this and what caused it? The only thing i downloaded was Microsoft 2012 Trial would that have done anything?My computer wont boot up right i dont know how to fix it or what caused it ?
Sounds like u need to do a system restore. insert the cd for ur OS and look for that option.
Use your OS CD to fixboot ( repair directory %26gt;%26gt;%26gt; type fixboot exe ) or repair your OS.

Boot from OS CD %26gt;%26gt;%26gt; Go to bios %26gt;%26gt;%26gt; boot priority %26gt;%26gt;%26gt; select CD or DVDMy computer wont boot up right i dont know how to fix it or what caused it ?
Sounds like you may have gotten some malware on your computer. Quick and easy - do a system restore with the provided OS disk. Or you can try to boot the computer in safe mode and run malware bytes off a flash drive or try and install it to see if you can remove it.
who is the manufacturer of the computer...???My computer wont boot up right i dont know how to fix it or what caused it ?
Unless you downloaded from the Microsoft site direct, you probably downloaded an illegal and infected copy. The Internet Security popup was probably a false or rogue anti-virus. These are generally a serious spyware infection and should be dealt with IMMEDIATELY. What you should have done was downloaded the free scanner from http://malwarebytes.org and run the full scan. Always FIX the problem first or anything else you do just makes it worse. Since it probably came from your download and install instruction, it would have got a real hold on the machine. Your only option now is to run a repair re-install fro your recovery disk or OS disk that came with the machine. If you did not get one with the machine it will be the disk you created when it instructed you to make a recovery disk set when you first ran it. If you did not do this, you need to buy the recovery set from the manufacturer. If the repair re-install does not work you would need to run the FULL install, this will lose all your files and programs.

Even after this, there is no guarantee the infection is gone, the files will still lie dormant on the machine waiting to activate. So you MUST then do the Malwarebytes scan.