I never had that problem. It is read when I start a browser, but even then I can rename it.

Things to try:
1. Boot into Safe Mode. Might work.
2. Boot into Linux. A disc or USB-stick is free to make. You'll find the file manager in Ubuntu, Mint or Zoring easy to use. Be sure to shutdown Windows before you boot into Linux. Hibernating is not enough! This surely works.