Gammalt, gammalt "problem".
Many people have encountered a bug in Windows XP that prevents them from deleting large .avi (divx) files. The bug results from behavior that causes Explorer to read the entire contents of broken AVI files before allowing access to them. The file shmedia.dll is the root of this issue, as it dictates Explorer's treatment of .avi files.
To correct this misbehavior in Windows XP, remove the following
registry key.
HKEY_LOCAL_MACHINE / SOFTWARE / Classes / CLSID / {87D62D94-71B3-4b9a-9489-5FE6850DC73E} / InProcServer32
This will prevent Explorer from loading shmedia.dll in response to file property queries on these files.
You cannot find this key by searching; you'll have to manually browse for it. Remember: editing the registry is a great way to mess up your computer. If in doubt, back up the registry before tweaking it.