I decided to install a PR via Desura because it is easier and faster solution. After a long installation procedure I started to update the version of PR. After a quick deal with error 1301 I finally started with an update. After a moment when I try to update to 1.0.31.0 error numer 62 appeared that looks like this:

access denied
The file that supposedly causes these abnormalities is like fort knox. Nothing can be done with it despite the fact that I am the Lord in my PC. Neither rename, or delete or change permissions. Any ideas about that fart?
My pc: Windows 7 Ultimate 64bit
Intel i5 2500k
Radeon HD6850
8 GB RAM


