See if this helps:
https://www.vistax64.com/tutorials/102501-encryption-disable-enable.html
I know it says how to enable disable encryption in Vista, but Win 7 is basically a refurbished Vista. There is a manual way to edit the registry but if your not comfortable with that use the downloadable reg file but I would still check the registry where the manual instructions point to, to make sure the entries are actually there before you run the reg file just to be safe.. I would make sure that no files are encrypted before you turn it off or you might not be able to de-crypt them afterwords. For that reason it would be a good idea to download both the on and off reg files and put them somewhere you can find them easily in case you need to turn it back on occasionally when you find a missed blue file.
https://www.vistax64.com/tutorials/102501-encryption-disable-enable.html
I know it says how to enable disable encryption in Vista, but Win 7 is basically a refurbished Vista. There is a manual way to edit the registry but if your not comfortable with that use the downloadable reg file but I would still check the registry where the manual instructions point to, to make sure the entries are actually there before you run the reg file just to be safe.. I would make sure that no files are encrypted before you turn it off or you might not be able to de-crypt them afterwords. For that reason it would be a good idea to download both the on and off reg files and put them somewhere you can find them easily in case you need to turn it back on occasionally when you find a missed blue file.