Recently, when installing VMware8.0 in Win7, I encountered Error:1325 Documents is not an valid short name. I still cannot install it. There are many answers on the Internet, but I failed to solve them one by one. Finally, combined with the solutions on the Internet, I summed up an effective method, at least on my machine is a success.
Found in the registry HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Explorer/Shell Folders directory, double-click the Favorites options. The diagram below:

Check whether the computer has D partition (D disk). If it does not (where the problem is), set it as follows:


Change the partition identifier specified by the Favorites string. Mine is D:\Favorites.
Note: at the beginning, there were no D disks on my machine, there were C, E, F and G disks, but I changed G disks to D disks.