Problems installing iTunes

I am trying to install Itunes on my PC that is running windows 7. The error I am receiving is "UNKNOWN\Components\25E80ACDE4D8FA340A7FB908F9CCEFFB\2B0163E6D0340BE4183EB2758E 9BEDD8. Verify that you have sufficient access to that key. or contact your support personnel." Please help.