SD stuck at uploading files

I'm having the same problem - before the update from 8 to 8.1 I had purchased extra storage & uploaded 78 GBs onto Skydrive and it was working like a dream until 48 hours ago. Now the progress is stuck at 'Uploading 17,000' files and just like Steve Townsend it shows the file names all saying 'Completed'. Just on the laptop the synch doesn't work in either direction while with my Samsung tablet & Galaxy S4 it is working fine. I tried a refresh but that didn't help and I've tried the Selfhelp troubleshooting .cab too - several times. I've seen a Microsoft person referring people to the Skydrive Synch problem FAQ but this deals only with the older desktop version. The number of files to be updated is now fluctuating but there are no files being up or downloaded. There should never have been such a high number of files to be 'uploaded' anyway.