how would i check a file's size (I know the file name too), and if it is more than 2kb and less than 4kb, then delete it? (I am trying to make a network.vbs worm remover. although i could just delete it manually, I want to use a dos batch file) Is it also possible to make a choice prompt (choose which OS to start up in? (beos / windows))? I am hoping that i have chosen the right message board this time.

Sure, you can determine if a file is larger than 2kb and less than 4kb. Post a sample of your DIR output, so we can see how it looks. As for your other question - possibly, but I cannot offer any help there since I don't have BeOS and probably not your version of Windows either; I use WfW 3.11. However, you might have to boot up 1st in one OS choose from a menu if you want to run the other OS and (after some file manovering) reboot the computer from a batch file. I think you may be better off with a dedicated boot manager, there are several free ones available on simtel or garbo.

BeOS 5 can run directly from real-mode DOS. You don't NEED to go to windoze first. My sys lets me choose DOS, Be or Windoze by ending with the following lines in autoexec.bat: C:\WIN98\COMMAND\choice Select environment: DOS or Windows or BeOS /c:dwb /tw,4 if errorlevel 3 goto BEOS if errorlevel 2 goto Windows if errorlevel 1 goto DOS if errorlevel 0 goto DOS :DOS goto EXIT :Windows @call win.bat goto exit :BEOS E: CD \BEOS LOADBEOS goto EXIT