There are several things that can cause this. It's advised to check if your PC meets the System Requirements of the software. To do that, you can visit the following website. Be aware not to save and use the root for your site on a shared driver. If you are using a shared driver, try changing the location to My Documents for example. This might fix your problem. Also, disabling the Related files option can fix this. To do that, go to Preferences -> General and you either turn off "Enable Related Files" or set "Discover Dynamically-Related Files" to Disabled.
For more information regarding this issue, you can visit the following forum.