Computer is a Compaq 5000 US running Win Me, Duron 750, and currently has a single 64Mb stick of Compaq (Hyundai) PC100 SDRAM installed in the first of 3 DIMM slots. The other 2 are empty. In an effort to speed it up a bit, the 64 Mb stick was replaced with a single stick of 128 Mb K-Byte PC 100 SDRAM, expecting that it would be recognized and work fine so that a second one could be added in slot 2.
But the computer would not boot with the 128 in slot 1. So it was removed and the 64 was replaced and things worked fine. Then the 64 was left in slot 1 and the 128 was moved to slot 2. Computer booted and ran fine but the 128 was not recognized, either by the BIOS or the Belarc diagnostic program.
Solutions would be most welcome.