Moving File Failed error [Solved]

Hello. I know this problem happen to many people but I already tried so many “solutions” and I still can´t fix it.
My problem is this:

Everytime that I create a new project or adding scripts and stuff I get this error.
11126-err_unity.png

Always.

I already tried to run unity as administrator, fixed registry, put the project in another folder, format my pc to discard a system error and the error still appearing.

What I can do?

I use windows 7 32 bits.

There may be another program using the file, or you may have a malicious program running on your computer. I also get the error because Dropbox automatically syncs my project files.

In my case it had been the SVN Client, but first reply help me the guess it…