Extracting RAR files

I have just downloaded first games from this site, and am trying to save as NDS files to make compatible with my R4 card.I have run the winRAR software, and when I right click file and press Extract file, I get Diagnostic errors saying 'access denied', 'cannot create', 'no files to extract'.Can anyone help?

Your download might have been corrupted.
But try downloading the latest version of WinRAR first.

Did you save that rar file on thumbdrive, or external drive?

Usually happens when the files are corrupted because of download problems.Try re-downloading it using Download Manager.

access denied sounds like you're trying to extract to a drive where you dont have write permissions (i.e its a read only drive).

I saved all RAR files on CD Drive

Once you put the files onto a CD, if you try to choose "Extract" it will try to extract them to a CD. Windows won't be able to extract the files to the CD.Drag the file onto your Desktop, then choose Extract.

Thanks,I have dragged to Desktop & extracted and it has successfully converted to NDS. BUT when trying to open on the DS, I open from Games menu and it freezes on the very frist Nintendo screen - any ideas for helpon this one?

Depends on the game.
Update to Ysmenu, if you haven't already.
https://www.romulation.org/forum/index.php?topic=27617.0Check out this thread for specific games that may have anti-piracy issues, etc.
https://www.romulation.org/forum/index.php?topic=29845.0

Thanks, I'll try that (Only seems to happen with Legend of Zelda)