"The CrossAppDomainPointer is NULL" or "Error stuffing with an RT_GROUP_ICON resource named #101. Access is denied" error

Possible solutions: 

1. Check access rights for "%ALLUSERSPROFILE%\Microsoft\Crypto\RSA\MachineKeys" directory and all files and sub-folders inside it. Your Windows account (and sometimes "Users" account if exists) should have Full access to them;
2. Try running the installer as administrator;
3. Disable any antivirus/firewall software which may lock any files ReSharper creates during installation process;
4. If you use web installer, download a full one;
5. Try to reboot the computer.