Thank you for reply.
After doing an error checking scan on the local C drive, windows advised to restart to fix the error.
On reboot CHDSK did a scan / repair.
Upon restart I noticed the exb database file was now missing. So I logged into EN, and it is now downloading my database,
Should be ok now hopefully,
I've also excluded the directory from the scans as advised (just to check is that 100% safe?)
Thanks
ps. before i saw your reply i checked my log and here are last few entries when closed the program last night:
00:31:38 [ERROR ] [10676] [6072] Failed to get changes from CE uid=6xxxx, timed out
00:31:38 [ERROR ] [10676] [6072] Failed to get changes from CE uid=0, timed out
00:31:38 [INFO ] [10676] [6072] Closed database: C:\Users\XXXX\Evernote\Databases\XXXXX.exb (3.9 GB +8.2 MB)