(14 year old me had opened the System file with ResEdit. Turns out opening a System menu resource for editing while it was in use was a really bad idea).
First proper computer. Learned a lot with it.
I did that just the other month on a modern PC using WSL on Win10. Turns out McAfee leaks memory like a sieve when faced with WSL, and it leaks it in a way that the memory is never even returned to the OS. Worse, yet, the process using the memory doesn't even show under Task Manager! The memory just appears to disappear.
Never noticed at home as I don't run McAfee, but at work had to. It is very quick & easy to fully exhaust memory building even a moderately sized C++ project under WSL. I had hard-lockups several times before I was able to determine the cause, with help from the MS team working on WSL. I had to do a hard restart; there was no way to restart cleanly. Especially problematic when I first ran into it working remotely and RDP'd into my work desktop.
Disabling McAfee on my work PC resolved it.
(edit: add quote to what I was referring)
When MSIE first came out I was explicitly prohibited from using it (typical of IBM at the time). Netscape gets slagged for becoming bloatware but the initial versions were fairly decent and cross–platform. IBM WebExplorer was genuinely not too bad, but it became a victim of IBM internal politics and died a slow death of neglect.
True tidbit which I have no public sources to cite: IBM WebExplorer was the first browser to support scripting, albeit in Rexx, IIRC a couple of months before LiveScript came to Netscape. IBM, in its wisdom, decided not to release that browser, I believe out of concern it might undercut the market for Lotus Notes.
I also remember using a shareware winsock implementation to get online, Trumpet Winsock.
TCP/IP on OS/2 2.x and Windows 3.x was provided through shims or DLLs. I think out-of-the-box OS/2 came with no networking at all (you could add SNA/APPC) and Windows had a couple of TCP/IP packages you could add. Neither operating system was prepared for the explosion in TCP/IP networking in 1994-1995.