Error says my Windows 10 NTFS C drive file system is no longer supported, hasn't synced in weeks

[KitCase]

I'm a bit desperate for a solution, I've been talking to Dropbox support and even escalated my problem to tech (who haven't been very helpful with long pauses in communication I can't get help promptly. I had to provoke another support ticket in order for them to respond again)

Everytime I startup my computer, I get an error message as such: 

This error appeared umprompted and out of the blue one day at work last week and has plagued my computer since. Dropbox has worked flawlessly on this system beforehand and now it won't sync at all.

This is all happening on the C drive of my Windows 10 computer, it is a NTFS parition and the system running the latest updates. The Dropbox folder is in the default location (in the user folder)

I have tried the following:

• Re-installed (scrubbed registry, deleted all local files, cleaned up junk files per Dropbox support instructions) 3 times
• Moved Dropbox folder (still tells me the file system is unsupported)
• Re-synced entire dropbox folder
• Re-installed with anti virus disabled

No progress. There was, though, a single day it let me run Dropbox and actually synced my folder but went right back to giving me the error near the end of the day and returned to it's old habit.

[KitCase]

Bad news. The problem returned. Got the error again this morning after booting up my computer. 

The email chain I've been maintaining with a specialist has marked this problem as solved, do I contact them again? Can I contact them again?

[Lusil · Accepted solution]

Hey again @KitCase, 

To reach back to my colleague, you can send a reply to the email discussion you previously had with them and, in the meantime, I’ve also given them a nudge. 

In your reply, please let them know of any relevant info regarding the behavior you experienced recently so that they have a better understanding and investigate appropriately for you. 

Once again, sorry to hear that you’re still having issues with this and thank you in advance for your cooperation.