Nope. In writing, it's technically ambiguous -- it could mean both "can't be installed" or "can't be uninstalled" but to me it means "can't be uninstalled". In spoken language, it depends how you stress the first syllable and both could be used, I guess.

That's why if you want to denote the installability of something, you should use the nonambiguous installable-noninstallable pair and leave the word "uninstallable" for the "can't be uninstalled" meaning. AFAICT, whether you should spell it as "non-installable" or "noninstallable" (note the hyphen) is up to you.

Again, in my personal experience, uninstallable definitely means 2 in [1]: "uninstall-able". Pretty sure I never saw that word used as "un-installable".

[1]: https://en.wiktionary.org/wiki/uninstallable