If anyone has any ideas, PLEASE do what Dropbox won't and give me a hand.
Dropbox works on all other computers I use, including mobile devices. It may have something to do with having my Dropbox folder on a secondary drive, but it's been like that for at least a year with no problem. No other program has a problem, just Dropbox. Go to HKEYCLASSESROOT/.exe and double-click the (Default) key in the left pane. Press the Windows + R keys, type regedit, and click OK. All I can do from here is reinstall Windows, but I'm not doing that just because Dropbox won't run. exe files can be a big problem, but you should be able to fix it simply by changing your registry. I've uninstalled, purged everything from the registry, tried the offline installer, shut down Windows Firewall, removed antivirus. Crashes upon manual startup, can't be reinstalled, the installer crashes or maybe finishes but still can't start the client. My dropbox stopped starting at system start and would show the same behavior as to OP. They keep giving me the same fixes over and over, obviously they on't care enough to do anything but keep sending my the same stock email (open the ports, unblock in firewall, etc) that haven't helped. I have been dealing with this for months! And Dropbox support ought to be embarrassed by their lack of a resolution after all this time.
