Hey folks, I'm in the middle of my trial of AnyDVD HD on my brand new machine that i've just finished building a week or so ago. I now finally have the power to run high definition videos including HD-DVDs on my PC. As such my XBOX 360 HD-DVD drive has migrated over onto the top of my PC case. Last weekend I watched my first HD-DVDs via that drive and all was fairly well, after watching a few disks though and using the system I did start to have a problem where My Computer windows were locked up.. slowly but surely my system would crawl to a halt and not even be able to shutdown windows properly as the hung processes wouldn't even be killed for a shutdown. I got so worried about this i decided i wanted to try and eliminate what was causing the problem. All this week the XBOX 360 HD-DVD drive has been unplugged from my machine.. for the most part its been ok, I thought worryingly it was caused by the drive itself. Tonight, almost 1 week later the problem has just happened again.. I've had a firewire drive, and my gigabeat rockbox mp3 player plugged in via firewire and USB respectively.. they'd both been unplugged though and the main machine was running and idling fine. I came to watch some video files in Zoomplayer off my hdd.. all was well.. i went to navigating around directories again, everything working fine only to be met as i reached My Computer level with a stalled window.. all grey, not updating... thankfully i had a few other explorer windows open and i noticed that they were all working fine.. I started typing into their address bars to navigate to each of my drives.. going to c:\ worked fine.. going to d:\ hung the explorer window (this is my Benq DD DW1650 DVD-RW drive [showing as a SCSI CdRom Device in Device Manager] which all the time i've been having problems has had the Command And Conquer 3 game DVD inserted). With another window down i moved to another explorer window and typed in e:\ this also hung the window (this is my Plextor CD-RW PX-W2410A drive, again showing as SCSI CdRom Device). I managed to kill firefox by asking it to open a file, and selecting the current path which effectively shows you your entire computer in a dropdown. Finally i used command prompts to complete the traversal of drives.. the remaining drive letters were HDD partitions and they were all accessible.. telling the command prompt to go to D:\ or E:\ hung them as the explorer windows were hung. The specs of my machine are Gigabyte GA 965P-DQ6 Intel Core 2 Duo E6600 @ stock speed 2gig of Geil memory EVGA Geforce 8800 GTX afore mentioned optical drives 2xSamsung 500gig SATA drives 1xSamsung 250gig SATA drive relevant software installed (and potentially running most of the time) EDSET nod32 anti-virus Sunbelt kerio personal firewall Speedfan PowerDVD WinDVD Nvidia DVD Zoomplayer Steam Skype Trillian After the process of elimination earlier, detailed above (probably in too much detail, sorry but i wanted to be thorough) I am starting to think that AnyDVD HD could be causing the problem some how seeing as how only optical drives seem to be locked up.. having started to remember that the C&C3 disk has been inserted all this time I also wonder if somehow its copy protection (if it has any) could also be potentially at fault. I was wondering if i can untick auto startup for anydvd, and if even though in demo this will be respected (it warns that settings wont be saved).. or if i kill the application as soon as i'm booted am I assured that AnyDVD HD is completely out of the way. I'm assuming my optical drives showing as SCSI cd-rom devices is due to them being wrapped in AnyDVD's drivers, and so even though i can have the app killed that wrapping will still be occuring. Is it possible that if something locks up or times out in AnyDVD that windows will stop being able to get a response and hence hang? I'll be happy to run some debug builds to try and identify any potential problem via an extensive log file... I am very very interested in buying AnyDVD as i see it forming the basis of my HTPC in the HD era, but I am very frustrated with such a fresh machine having problems that require a force shutdown whenever explorer and windows locks up due to this problem. Hope you can help me, thanks for your time.. and the great program.