when I use winrar it freezes my computer and i've uninstalled and reinstalled but nothing can anyone help me?
I have not heard of that problem with winrar before, but you may want to check out the open source 7-Zip (if you have Windows). It is what I use.
Also, if you use the latest version of WinZip, it will open rar files. As for your exact problem, I would make sure that you have the latest version of WinRAR installed. If you do, then you may want to try and contact their support team to see if there's a solution to your problem.