Changing file path name

I have several Excel files that do a VLOOKUP for data where I have to use the file path for access to the source files (e.g., C:\Users\User Name\file path). Since I use Dropbox to enable use of these updated files on two other computers, I need to have the path names identical for the VLOOKUP function to work.

On my Vista machine, I am using the Computer Name for the User Name. On my Windows 8.1 laptop I would like to use the same User Name, which is now different. However, when I go to User Control in Control Panel, I don't seem to be able to find a way to change the User Name.

There must be a secret. Any help is appreciated.

Houston, TX

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