I have no picture (only blur) with AVI and MPG files in Nero 7. Can anyone help me? Until recently I was able to watch both AVI and MPG movies with Nero. Suddenly, a warning dialog box appeared stating that I didn't have authorization to change the settings in Catalyst Control Center (an ATI product), although I wasn't trying to do anything. To solve that problem, I tried two methods: Undating the Catalyst Control Center from 5.11 to 7.1 didn't work because I received this error message "The file 'ati nvt2.sys' on ATI T200 Unified AVStream Driver Disk is needed. So I uninstalled 7.1 and reinstalled 5.11 which I knew worked. The second method was to use System Restore to restore back one week. This caused 129 files to be renamed with a (2). Most of these files belonged to unrelated files such as Firefox and Yahoo Widgets. I changed some of these back to their original names including 4 that were in System32, which were wdmaud, kuser, lvcodec2, and lvcoinst. When I kept having problems, I added back into the System32 folder the changed files with (2) in their names. Most of the 129 renamed files, I didn't need to change back, because I uninstalled the programs, such as Yahoo Widgets. With problems mounting, I tried to undo the System Restore, which I was not allowed to do. I was also not allowed to do another System Restore. While I don't get the warning message saying you are not authorized to change Catayst Control Center settings (that was fixed by the System Restore), I now cannot play any video/movie in Nero 7 (or Media Player Classic). The picture comes on, but is blurry, as if tiled. I've tried uninstalling and reinstalling various versions of Nero, including 220.127.116.11b, 7.5 7.0, and 18.104.22.168. When I uninstalled Nero, I used the General-Clean Tool, and once I also used SEARCH to delete other folders/files called Ahead or Nero. I've used sfc /scannow. I've tried adding K-Lite 2.8.2 Full Codec Pack and XP 2.0.6 Codec Pack. I've used three codec analyzers, and once when Nero 7 was uninstalled, Sherlock Codec Analyser reported that there was a problem (no driver) for the Nero codec called Nero Digital AVC Video ENC, which was resolved when Nero was reinstalled. Currently I have Nero 22.214.171.124 installed and MPG and AVI movies are blurry in Showtime. Media Player Classic is also blurry like Nero 7 Showtime, but not WMP10 which plays these formats fine. (pls don't suggest I use it - I paid for Nero 7) I also have Cole2K Media Codec Pack installed. Do I have to take a desperate measure, such as Repair XP or reinstall XP? I'd be grateful to anyone who can help me diagnose and solve this issue. I'm really at my wits end. Thanks.