I recently had problems with Evernote on my Windows laptop, and I want to document my notes here in case you run into a similar issue.
I am not certain what was the cause of the problem, but one day I could not synchronize my Evernote client on my Windows laptop. It kept saying I could not reach the server. This was odd, because I could access the Internet and login to evernote.com and see my notes there.
Now the first thing I should have done is work to resolve this. Instead, I kept adding things to the Evernote that was having a problem. Bad idea. I can’t tell if I lost what I kept at the time. It doesn’t appear that I did, but don’t make this error. Work to fix it right away.
I tried a number of things to fix it. Finally what seem to fix it was uninstalling it, and then installing it using the Advanced install option. Going through the Advanced option, I picked a different directory than the default directory to install it in. When I brought up the Evernote client, I was notified by my security software that Evernote was trying to connect to the Internet. I allowed it and it then the client worked fine.
My theory is that there was something corrupted with the files in the old location where I had Evernote installed. As a result, uninstalling and then reinstalling didn’t correct the problem. Now this is somewhat odd, because when you uninstall Evernote, the file directory seems to go away. That leads to my other theory, and that is that there was something else that was corrupted (e.g. registry? appdata?), and that picking another directory with the Advanced option forced the installer to ignore the old settings and come up with new default settings.
The good news is that the problem is fixed and Evernote is fine and syncing is fine. I just checked and a note I just added an synced on my laptop flowed over to my iPhone.