I was trying to install iTunes 10 and kept getting "The instruction at "0x7c91b21a" referenced memory at 0x4944475f". The memory can not be written. This is specifically when trying to start the IPodService.exe. When I called Apple, the engineers told me I needed to change my boot.ini file from noexecute=alwaysoff to noexecute=OptIn and referenced kb875352 (http://support.microsoft.com/kb/875352). When I did that and rebooted, I continually get physical memory dumps. What do I need to do to stop the physical memory dumps? I have run chkdsk /f and had no bad sectors and have rebuilt all indexes.Thanks1 person needs an answerI do too

The default is "OptIn" of course and that is the preferred option. It would be interesting to know how it got set to "alwaysoff"... Someone would have to do that by hand on purpose - perhaps manually or via msconfig - do you recall? Were you getting some DEP errors before? Was that an attempt to "fix" some other problem? That is not the way to fix DEP errors!It is not clear if your system boots and runs at all of if it crashes right away. If it runs, we can get more information and figure out what is going on and fix it properly. If it does not run, how did you run chkdsk /f? From Recovery Console? If yes, you can undo the "OptIn" temporarily in order to get running again. Do you have a genuine bootable XP installation CD? Please provide additional information about your system:Describe your current antivirus and anti malware situation: McAfee, Norton, Spybot, AVG, Avira!, MSE, Defender, ZoneAlarm, PC Tools, Comodo, etc.Click Start, Run and in the box enter:msinfo32Click OK, and when the System Summary info appears, click Edit, Select All, Copy and then paste the information back here.There will be some personal information (like System Name and User Name), and whatever appears to be private information to you, just delete it from the pasted information.For video driver information, expand the Components, click Display, click Edit, Select All, Copy and then paste the information back here.For audio information, expand the Components, click Sound Device, click Edit, Select All, Copy and then paste the information back here.This will minimize back and forth Q&A and eliminate guesswork.Download BlueScreenView from here:http://www.nirsoft.net/utils/blue_screen_view.htmlUnzip and run it (BSV installs nothing) and let it finish scanning all your dump files. If you double click on of the dumps, you will get some information about it (including the Caused By Driver field) and you may be able to spot the problem right away - especially if you see a pattern in the dumps where the Caused by Driver field is the same (start with that driver).Select (highlight) one or more of the most recent dump files by clicking them and holding down the Ctrl key to select multiples files. Try to select just the most recent ones that relate to your issue (maybe five or so dump files to get started).Click File, Save Selected Items and save the information from the dumps to a text file on your desktop called BSOD.txt. Open BSOD.txt with a text editor, copy all the text and paste it into your next reply.Here is an example of the BSV report from a single BSOD that I initiated on purpose that shows the cause of the crash as the i8042prt.sys driver belonging to Microsoft Corporation:==================================================Dump File : Mini062110-01.dmpCrash Time : 6/21/2010 11:51:31 AMBug Check String : MANUALLY_INITIATED_CRASHBug Check Code : 0x000000e2Parameter 1 : 0x00000000Parameter 2 : 0x00000000Parameter 3 : 0x00000000Parameter 4 : 0x00000000Caused By Driver : i8042prt.sysCaused By Address : i8042prt.sys+27fbFile Description : i8042 Port DriverProduct Name : Microsoft® Windows® Operating SystemCompany : Microsoft CorporationFile Version : 5.1.2600.5512 (xpsp.080413-2108)Processor : 32-bitComputer Name : Full Path : C:\WINDOWS\minidump\Mini062110-01.dmp==================================================Send the information from the last 5 memory dumps.Don't guess what the problem might be - figure it out and fix it. I need YOUR votes and points for helpful replies and Propose as Answers. I am saving up for a pony!