Firstly, I've just registered, so hi to everyone. I've been getting a regular bsod usually of the irq_not equal type. I've been somewhat frustrated by this problem as I don't get a memory dump and was wondering if there's something that might have disabled it. The message says "memory dump complete" pretty much immediately. A memory.dmp of zero length is created in the root and checking the minidump folder in Windows revieals an empty folder. Things I can tell you about this problem: 1) It always happens when active on the net, either downloading or browsing. 2) I begun to happen after I loaded .net framework 3.5. I had a problem installing this because Windows had lost the uninstall date for version 2.0. I had to use Aaron Stebner's cleanup tool then reinstall v.2.0 and then v.3.5. 3) Yes I do use Zonealarm (5.5) but have done so for years without problems. 4) memory info for afd.sys was B05BF50 0x00000002 0x00000000 0xB05BF5A0 I did do a restore to before the net framework install but of course the damage has been done and apps reliant on version 2.0 wouldn't work so I had to cleanup and reinstall that. I didn't however, install 3.5 this time. Some evironment details: O/s: Win XP pro SP3 Net Card : 3com 100mb Dlink router Graphics:Ati 9800 Pro CPU: athlon 2800+ XP MB: MSI K7 This will happen again no doubt and I'm sure you guys want the memory dump info so my first mission is to find out why I'm not getting a dump. Otherwise does anyone know of any problems related to afd.sys or what it does ( I can't see this process in process explorer)? MS have a hotfix for exactly this problem but related to win2K only. There is no mention of this problem related to Winxp. I do tend to think though that some kind of memory leak is occuring as in the win2K problem as it happens after some time of browsing or net use. Any suggestions would be welcome. Edit: I've found that memory dump was turned off in system control panel. I've set it to mini so hopefully I'll now get some information to post up soon.