Installing the correct drivers is always the best course of action. That in no way is meant to imply you didn't. There is a possibility that Acer no longer supports W95. Perhaps what you installed were the 98 drivers instead. In any case, try downloading again to your laptop, and reinstalling. However, I would recommend going to acer.com, selecting Support and navigating to downloads & drivers and downloading drivers from there. If you find proprietary drivers elsewehre, in many cases they are merely rip-offs of the original. My best recommendation is to get them directly from acer.com.
I've noticed that Acer, Compaq & Gateway are troublesome unless you install the OEM (factory) discs in some cases. One maker is the exception, HP. Just be advised that you might not be able to do this. Another thought, take the bundled drivers off the recovery discs (if any). All makers vary so you may need to browse the disc to locate them.
Good Luck!