Just getting error messages on a machine booting Windows 9X doesn´t always mean incompatible memory. Most machines (most that I have seen) by default do not use a CONFIG.SYS file or they do not have instructions to test memory properly at boot-up, consequentialy, you get errors later in Windows. Insert these lines (exactly) into your config.sys file using notepad or sysedit program as the two first entrys and let DOS test your memory before Windows uses it: DOS=HIGH,UMB DEVICE=C:\WINDOWS\HIMEM.SYS /TESTMEM:ON /V Note the switch "ON" and /V, very important! If you observe any errors here at boot, take the suspect memory out and try in another machine with the same config.sys instructions (a boot floppy is preferable). You might find the memory was bad, or the memory slot was dirty or defective. This is a simple test, I know, but it is fast. Howard in Fortaleza, Brazil PCBUILD's List Owners: Bob Wright<[log in to unmask]> Drew Dunn<[log in to unmask]>