it says that during instalation ? or when mounting ?

Please tell us exactly what you are typing in Dosbox and exactly what it says when the error occurs.

ok now I feel embarrased, it seems it won't work when you try: mount c c:
I remember reading somewhere it needs to be a directory you want to mount, not the root.

So basically this problem, if there ever was any, is solved.......

anyway, thnx for reading........and dosbox still rocks....😉

If you really *want* to mount the root (which is NOT recommended,
and it's your problem if something goes wrong) you can use
"mount c c:\"
By all means you should avoid this and put your stuff into a subdirectory,
like c:\oldstuff and mount that.

You forgot to add the backslash character (\). That's why it wasn't working for you. Anyway, do as suggested and mount an specific folder (not the root) as drive c.

Just create a folder named oldgames, dosgames or something short like that and mount it as your C drive.

e.g. mount c c:\dosgames -freesize 700

That would mount c:\oldgames as drive C with 700MB of free space.