Here's the story. The computer I am refering to is an older computer with a HOT-557 V1.32 mainboard. I have recently clean installed windows 95A and it has been working fine. I decided to switch over to DIMM memory from SIMM and bought a stick of 32 MEg PC100 because I read that was the max for each slot of DIMM for this board. I put in the DIMM and removed the SIMM and started the computer. It encountered registry problems and gave me the option to use the backup and restart. I did and the computer restarted and began working normally. I began loading some software when I discovered my Win 95 B CD and decided to clean install with this disk for FAT32. I did so and after it completed the installation it said I had to restart. Half way through the startup it gave me the registry error and asked if I wanted to use backup. Only now it locks up. So I decided to do some checking into the nmanual on the memory and found out I should have bought 32 Meg SDRAM and it has to be double sided. Duh! I removed the memory and reinstalled the SIMMs I had and I am still having the same problem. Could installing the wrong memory have caused this problem? What should I do? Reformat and reinstall with old memory? Have I totally screwed it up? Please help. Also where can I find 32 Meg SDRAM that is double sided

A registry that is damaged multiple times is often a symptom of failing memory (incorrect memory would do the same). Windows is pretty good at helping you get back an older registry but there is a high probability that more files were corrupted besides the registry. Those other damaged files might not cause problems on start but they'll show up later. I think you should consider a fresh install after you fix the memory problem.