How to convert a windows WIM file to a ISO file

I just downloaded the ADK for Windows8 from MS directly, how do I upgrade it? I am having the same problem with the file size limit

Hello. I have bought a netbook with a genuine copy of Vista but the goof who sold me it installed linux or some rubbsh like that and put the 3 vista files (boot.wim, install.wim and X14-63452.exe) on the desktop: now I can't convert install.wim into ISO format! pleas HELP.

Okay Linux isn't rubbish but please can some give me simple systematic step by step instructions to convert these 3 files to an ISO then make it on a bootable pen drive?

Thanks, I missed school this morning because I stayed up all night trying to get this to work!

Hmmm... now it runs the installer program from the USB but it won't accept the (valid) product key...? Any clues?

Are you sure you've installed the correct Vista version as shown on the COA sticker? If so then the issue is always a mistyped character. 8 can look like B. If necessary use a magnifying glass or take a camera snap with zoom. There is no way it won't work if the version and key are correct.

Hi, I think there was Ubuntu installed already so I guess I have to re format the recipient computer hard drive to NTFS. This could cause the installation to abort. The Vista installer could not reformat the HDD so I will try using my favourite partition tool Gparted. Can't remember if I need two partitions or one (maybe two because the windows boot .ini file needs to be on a separate, much smaller, partition)?