I currently have two computers syncing to skydrive. They were syncing the same folder to skydrive, such that the folder would remain identical across computers. I was backing up in the directory Skydrive/Backup

I recently upgraded one of them to Windows 8.1. The other one has Windows 7. Now, it appears to have made a ton of "dummy" files in which don't open or sync to skydrive. 

For example, let's say I have a word document Test.doc. There are now two files, Test.doc and Test-nameofwindows7computer.doc. Test.doc does not open, while Test-nameofwindows7computer.doc seems to be the original file and working fine. This has broken some of the applications on my computer, as the file they reference does not open.

How do I remove these dummy files and sync skydrive like I did prior to the update?

The current error in skydrive is 

"Files can't be uploaded because we can't access the folder. For help, contact your administrator"
C:\Users\Computername\SkyDrive\Backup\My Music

This folder doesn't exist, so that would probably explain why skydrive seems to be confused. Not sure why it's trying to upload that folder anyways.