I also had this problem with these exact same files and tried many things including a repair, fresh install, checking permissions and all sorts, basically after troubleshooting for a few hours including trying to disable and add exceptions to Bit Defender i managed to get it to work as follows
1) Open Bit Defender
2) Protection > Advanced > Bit Defender Shield - Set this to disabled for 15 or 30 minutes however long you need
3) Restart your computer (this is a crucial step it doesn't seem to apply otherwise)
4) Do the install
5) Big success
6) Protection > Advanced > Bit Defender Shield - Set this to enabled