after my pc was infected with a virus,I found that when I double-click on any drive I receive the open-with menu.
I cleaned my pc but it did not fix the problem so I had to format my C: and install WinXP pro again but strangly I keep receiving the same message :rolleyes:
how to fix it from the reg-editor? ??? 
Do you mean that you’ve installed Windows again over the old installation or format before?
Strange that a ‘new’ Windows installation will be acting that way…
I didn’t reinstall windows over the old one…
I formatted my C: drive then installed a fresh copy of windows.
So… a bad Windows installation…
Will this help?
http://www.symantec.com/security_response/writeup.jsp?docid=2004-050614-0532-99
thnx Tech ;D
it was fixed by this page:
http://www.winhelponline.com/articles/223/1/Open-With-dialog-appears-when-double-clicking-on-a-mapped-network-drive-in-My-Computer.html
Good shot. Thanks for the link. I’ve downloaded the tool just in case…