This is a great way to make sure that the archive was created successfully with no errors. You can set the archiver to test the archive after it's done creating. If you're creating an archive with WinRAR Portable you can add a password on to the archive to make sure that nobody you don't want to see your files will be able to have access to them. This would be a fast and painless process and it would function exactly as you would expect it to from any other use of WinRAR. You can archive the large file into a small rar file on the first computer, copy that file to your USB stick along with WinRAR Portable and then run WinRAR Portable right off your USB stick on the target computer to extract the much larger file to the new computer. WinRAR Portable is a great solution if you need to transfer a large file to a computer without internet access and all you have is a small USB stick.
It archives and extracts files just as well as the larger WinRAR does. It can be helpful when unpacking a non-solid archive containing files encrypted with different passwords.WinRAR Portable is simply the portable version of the world famous and much loved WinRAR.
Name of unpacking file is now included into WinRAR incorrect password warning for RAR5 archives. When using “File/Change drive” command, WinRAR saves the last folder of previous drive and restores it if that drive is selected again later. Previous versions ignored -ri and set the priority to low in the presence of -ibck switch. If -ibck -ri switches are used together, WinRAR process sets the priority specified in -ri switch. It can be useful if only the archive type or total information Switch -idn hides archived names also in ‘v’ and ‘l’ commands. Now this message is followed by a detailed reason like access denied or file being used by another process.In the past this extended error information was available in WinRAR, but not in SFX archives. Where appropriate, SFX archive displays the additional line with detailed error information provided by operating system.For example, previously such archive would display “Cannot create file” message alone. Some other factors are also involved in limiting the practical application of this attack. Such attack is only possible if the intruder has managed to spoof or otherwise control user’s DNS records. 
This is done to prevent a malicious web page from executing existing files on a user’s computer.
It also implements additional checks within the web notifier.
WinRAR uses https instead of http in the web notifier window, home page and themes links. It is done to prevent possible attacks with inclusion of ZIP archive into the signature body.We already prohibited extracting contents of such malformed archives in WinRAR 6.01. ZIP SFX module refuses to process SFX commands stored in archive comment if such comment is resided after beginning of Authenticode digital signature.
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