CRC failed in XKRN72022.dll it means that the file is corrupt. There are many reasons why you get this type of error, most likely causes from the top of my head:
1) File got corrupted during download, if it was not already corrupted by the uploader. (your router perhaps??). Solution: Re-download the package. Try installing on a different machine, if it works at least you know the download was fine.
2)Hdd or Ram error. If you have bad sectors on your HDD in the region where your package is stored. use HDD regenerator to check your HDD. Bad Ram, the file is corrupted when loading into memory. Use memtest98 to check your Ram.
3) Antivirus, that is easy, just disable it and see if it works. (disable antivirus while downloading, not recommended)
Finally, make sure you download the package from a trusted source, old_friend's website is a trusted source.
If you find what went wrong, please post it here so others will benefit from this as well.