I have read several threads on this forum about referenced memory errors and I still haven't figured out my problem, so here it is: It started yesterday, I have no idea from what. I recieve an error that says: "The instruction at "0x7c8edf9c" referenced memory at "0x7c8edf9c". The memory could not be "written". Click on OK to terminate the program. Click on CANCEL to debug the proram." Some things I have noticed: 1) The two numbers are the same every time I get the error. I don't recall any other number/letter sequence besides this one. 2) The error is always a could not be "written" one. 3) I ran memtest for 3 passes and it didn't find anything. 4) It happens randomly for all programs on my computer. It only occurs when I launch something, such as control panel or IE or firefox. 5) Sometimes the error says notepad.exe - application error even though I haven't launched notepad in a month. Most of the errors come up as "dwwin.exe - Application Error" 6) I am still able to use the programs despite the popup. For instance I recieved it when opening up firefox to view this forum, but I haven't clicked OK or Cancel yet so I could post this problem to you guys. Once I click ok the program will shut down or if I click cancel it goes into a VB debugger with garbage showing up. So, any help/recommendations would be greatly appreciated. I have scanned for viruses and spyware and haven't found anything. Memtest didn't find anything, so I am sort of stumped. I have used spybot search&destroy and I haven't noticed any unusual startup functions. Thanks again for any help. Edit: After I posted this I installed nero 7 and recieved a ton of popup errors, so I figured it may help to post them error: MSI starter - Program has a problem and needs to close Microsoft .NET Assembly Registration Utility - same NV4 Content.exe - Same Win32 Cabinet Self-Extractor - same Run a DLL as an App - same, but I recieved two of these Nero v126.96.36.199 ML.exe - same dwwin.exe - Application Error - same message as originally posted with the same letter/number sequence Data Execution Prevention - to help protect your computer, windows has closed this program: Run a DLL as an App Data Execution Prevention - to help protect your computer, windows has closed this program: Windows installer If I click ok on the dwwin.exe error I recieve "dumprep.exe - Application Error: The instruction at..." and everything else is the same.