**System Information**
Win 7 64-bit, Nvidia 720 GT
**Blender Version**
Deinstallation of 2.78a when updating to 2.78c.
**Description of error**
1. It's not good that Blender needs the originial, downloaded installation package "blender-2.78a-windows64.msi" to uninstall or update to an other Blender version!
2. I had to downalod the installer again from http://download.blender.org/release/Blender2.78/ but the deinstallation of 2.78a when updating to 2.78c failed. So I tried to just deinstall 2.78a and got the same error: 2753
Hope this help to improve y/our wonderful Blender! :)