Hi Julia,
I'm really unimpressed by AVG and its quibbling!

Right, time we got out the big guns, I think.
Plan: Rename your 5.2 copy of cdr4_xp.sys, and put a copy of the 5.3 file in that folder to see if it will fix the problem.
Renaming your file from cdr4_xp.SYS to cdr4_xp.OLD will take it out of play without destroying it, in case you need to go back to the original state.
[1] Can you get at that file in C:\Windows\System32\Drivers and rename it? You might have to do it in safe mode if Windows won't let you touch it.
[2] Download this file
cdr4_xp.txt 60.83K
228 downloads It's the 5.3.5.10 version of cdr4_xp.sys, but it has been renamed so I could post it.
[3] Rename my file to cdr4_xp.sys [just change the extension from .txt to .sys]
[4] Copy this file into C:\Windows\System32\Drivers, where it should take the place of your old file.
[5] Restart Windows and see if ECDC 5 still works
[6] If it does, see if AVG has stopped whining at you.
If it didn't work, delete my file and rename yours back to what it was, and let me know the bad news.
Regards,
Brendon
P4 @3.20GHz on Albatron PX-865PE Pro II with 2GB DDR-SDRAM, FX5900XT video, Viewsonic monitors,
BENQ DW1640, in XP Pro and Windows 7
I blame it all on Global Warming / Global Cooling / Global Staying the Same [pick one]