I have this old machine which I bought on a whim for about 10$ during Covid with the aim to use it as a retro DOS/Win PC. It's Pentium 4 based, so too fast for many/most DOS games, but with cpuspd it's usable.
I had it running OK, albeit not without some slight hardware problems, mostly sound related. I would like to address it at some point, but at the moment I have a more pressing issue.

The machine went into storage for a few years after the initial use, and now when I dragged it out again, I forgot most of the DOS/Win tricks. And managed to get stuck in the DOS mode permanently. I think I changed something in autoexec or config.sys, because when it asks me if I want to get back to Windows after boot, and I say "Y" at the command line, it just reboots and goes back to the same prompt. DOS works fine though.

Is there any simple tweak that would get me back into Windows again?