Close all programs. Launch Explorer and find the file you downloaded and unzip it to the same temporary directory.
Right-click on it and choose Merge.
Close Windows Explorer and then launch it again. You may need to reboot for the changes to take effect.
Change The Default Setting For Choosing An Application For “Unknown File Type”
Win9x users, have you ever mistakenly established or changed a file association by forgetting to uncheck the Always use this program to open this type of file box? Normally it doesn’t present a problem, you can just change the file association back again using the same technique. It can present a problem however, if you mistakenly do this with a file type that should not be associated with any particular program, like DLL or EXE files. The following instructions explain how you can change that default so that the box is unchecked. Here’s what to do:
Download this file: Assoc.zip to a temporary directory. Make note of its location when downloading.
Now close your browser and all programs.
Launch Windows Explorer and find Assoc.zip and unzip its contents to the same temporary directory.
Highlight and then right-click Assoc.reg. From the context menu choose Merge. Wait a few moments.
Now, while still in Explorer, hold down the Shift key and right click on any file. Choose Open with… and note that the default for the Always use this program to open this type of file box is unchecked.
Note: In some rare isolated cases, Win98SE will have problems associating files as it normally would once this modification has been effected. If you have problems opening programs after effecting this modification this is what you can do:
Drill down to HKEY_CLASSES_ROOT\ Unknown\ shell\ openas\ command.
Look in the right pane. Right click (Default) and choose Modify.
In the dialog box, delete only %2, but leave the rest of the string intact.
You have just undone what the REG file modified in the Registry. However, if, by any chance you’ve made other modifications you must fix them as well.
With Regedit still open, drill down to HKEY_CLASSES_ROOT\ AllFilesystemObjects\ Shell\ Openas\command and do exactly as you did above.
Look in the right pane.
Right click (Default) and Modify the string. Delete %2, just as before and leave all else intact.
That’s it. Close Regedit and reboot. The problem will be gone.
Please note that this problem is rare. Only two persons have reported odd side effects which, as it turned out, were only indirectly attributable to this modification. As with any and all modifications to your system, proceed with caution and be prepared to undo what you’ve done.