Hi guys,
I work in a company that just migrated all its units to a new domain.
After this migration some users started to complain about how slow their computer were while opening any file, even a txt notepad.
After some investigation we discovered that the registry of the users affected contained references to servers addresses that no longer existed. After deleting the invalid keys and folders on the registry the issue was solved!
This is also valid for the rigth mouse click button slowness issue.
What causes this issue is, when opening a file the program (notepad, excel, etc) search the network for those invalid references, that can be add-on's, printers or any other. When scanning the network it takes about 25 seconds for the process to fail, thus only opening the files after this failure.
Regards
Pedro Pinto