Hi, zipzap: On my HTPC i'm using Hauppauge pvr 350 to record tv-shows. It's these files I want to be able to edit correctly. On my other machine I have two separate OS partitions. One partition contain a clean install from an original XP SP0 CD. This installation is obviously updated to SP3. I'm testing nlite on the other partition. I'm sucessfully editing all video files on the first partition, but it fails when I install any XP that´s been nlitened! So on the very same machine video editing works fine if using the old CD, but not when I've used nlite. johnhc: No, i'm not using any virtual system, this is why i'm getting a headache!!! Witch one would you recommend using? I've tested quite a few different approaches: - Only SP2 - SP2 with hotfixes - SP2 with hotfixes and addons - Only SP3 - SP2 then adding SP3. - SP3 only - SP3 with a huge number of addons (including WMP11 and IE7) and DriverPacks. This took a DVD to burn... I do think I've tested a few more alternatives, but these are the ones I do remember. The result is always the same!!! I've been using nlite for about a year or two. Always the same problem... This is strange, I must do something wrong since i've had installations on a total of three (3) machines!!! Sometimes i retransfer my XP CD to harddrive so I know it is the original, but this does not change a thing. Best regards Bengt