Hello, I recently upgraded my system to an AMD64 Atlhon 64 with an ASRock AM2NF3-VSTA (which I inform that works very well in Win98SE- you only have to disable onboard UAA) and 2GB of DDRII Ram.I use this PC with triple boot - Windows XP, 98SE and Vista.Everything was ok until I put all RAM in my PC witch made my PC unbootable in 98SE.I solved this issue by changing MaxFileCache and MaxPhysPage parameters in the system.ini file and also by adding a Virtual Ramdrive of 1.6GB with XMSDSK (the remaining RAM is 400MB).And everything is fine.The system boots in Windows98SE although I have a few bugs just like the audio sometimes doesn't play at all for some instants (I have a SB Live 5.1) and the worst thing is that I can't open any DOS prompt window or app in Windows 98SE because it says: "Out of memory.Close some programs and try again".Since I'm using almost all of my RAM to virtual drive, the remaining ram is less than 512MB but It doesn't go anyway... Limiting the Windows RAM to 512MB in msconfig doesn't work also and messing with the MaxFileCache and MaxPhysPage parameters in the system.ini file doesn't solve this issue neither disabling Virtual Memory.Since my Windows 98SE is in Portuguese, R. Loew patch doesn't work (it says Unknown VMM file) even if I extract the VMM and VCache files from the english version of Win98SE. The actual paramters that I have is: MaxPhysPage=1FFFF MaxFileCache=65535 and limit windows memory to 256MB This made my windows to stop the lock ups but I can't run DOS. I want using DOS in this partition and I cant. What can I do to solve this issue? With the best regards, Rfsapiens. P.S.: Sorry for my bad and confusing english