error parsing c:\windows\microsoft.net\framework\v4.0.30319\config\machine.config
Parser returned error 0x80004001
I was getting this error... all i did was uninstall the .NET framework starting with 4 Extended... then 4... then 2....
After they were all uninstalled... i reinstalled the .NET Framework 4 only from the list within crossover's installable's...
it automatically installed 2 and 4 Extended...
now im not getting the issue anymore.