Setup - Pentium 3 100- ghz - 512 mb ram (2x256, 1 oem, and 1 king) - S3 savage 2000 chipset (Diamond Viper II) lag of real good xp drivers - Asus CUV4X-E motherboard - Samsung cdrom / Plextor 16x cdrw - 40 gig hd + fireware card, recently installed. *now removed System setup: Windows XP - 1 Primary partion Windows 98 - 2 Primary, with PQ Boot menu installed. GameRoguespear: which need EAX Problems - Instability XP / Windows 98 - Setup Windows XP CD Read Errors Erorrs: 1 - blue screen: irql not less or equal (xp, concerning videocard) 2 - blue screen: STOP 0x0050 PAGE_FAULT_IN_NON_PAGED_AREA (xp setup, xp, windows 98 ie errors) 3 - blue screen: concerning videocard in xp Advice Windows XP: turn off Memory Shadowing and Caching. 4 - windows startup: "Windows has encountered an error accessing the registry. Windows will fix the error and restart your computer" -- My Story: I have been using XP for somes months. Everything worked fine, except the videocard: The S3 Savage 2000 gave open gl problems. The XP-drivers are not offically supported, so I could expect it, thats why I disabled the 3d acceleration under XP, and played games on w98. W98 has ran withtout problems for 2.5 year. I often made images, so I always can easily reload a fresh windows, wich should have no problems at all. When the problems started: One day, I reinstalled my Windows 98, from XP, with DriveImage2002. I got an error, while writing. As a result of this, I got a halfwritten windows 98 installation. A few hours later, I restored windows 98 again. Now I succeeded. That is, when the problems started. I booted to Windows 98, and Windows says during start-up: "Windows has encountered an error accessing the registry. Windows will fix the error and restart your computer" Then when going to Windows XP, I eperience instability. IE often freezes, and I need close it. Other programs also die. Now I've too operating systems which both are not that stable. I can still do my work, but programs easily give errors, expecially internet explorer. Perfect images, which always worked, still give errors. I expect there is something wrong with the hardware. Note: I've been running programs without installing them, ie. Maya 4.5 under xp. RogueSpear under w98, which requires EAX. Could this affect my problem? What to do? - I will change the rams chips, cause I suspect there's something wrong with it. (Error 2) and I read error 4 has something to do with the memory too. - Install an other graphic card, which I was going to do, anyway. - Open my case, so all the heat can easiliy flow away. Heat problems? Links: About the Virtual Memory in XP http://aumha.org/win5/a/xpvm.php Microsoft Knowledge Base Article - 315335 (about pagefile) http://support.microsoft.com/default.aspx?scid=kb;en-us;315335 All tips/suggestions are welcome. Thanks in advance. Michael

I get the same errors that you do when trying to install windows XP. It seems that every time I try to install XP, I get to the hit ENTER to continue, and I hit enter and automatically get one of the above errors. I have had XP previously installed on this computer and I reformatted my drive. Now I can not get any OS to install on my PC, they all give me various errors. Any help for us?

I would go for the RAM first. Maybe instead of replacing all of them, try one stick at a time. See if the problems go away.

!!I HAVE FOUND THE PROBLEM!! Wohoo... It turned out to be a badly placed Network card. I changed it too an another slot, and that did the job. Tips for people who are experiencing ACPI errors, Page Fault in None Paged area, Himem.sys has detected unreliable xms memory at adress 006284EE XMS driver not installed, and system instability. Start trouble-shooting. I removed all unnecessarily hardware. So I left the videocard, and installed windows 98. From there I start putting back all the hardware. Thanks for reactions. Mike necessary