I'm trying to install Adobe Digital Editions on my Win10 computer. I get the error message E_IO_CANNOT_OPEN. I learned that this occurs because a certain temp folder in my Win 10 is read only. In fact, when I look, this temp folder isn't there at all. So I create it. Same problem. I look again and it's there but marked read_only. I eliminate the read_only, try again, and the same thing happens including the fact that the file is again marked read only. In case it matters, the temp file in question is in C:/Users/User. How can I stop this? Thanks.