I think my problem is related to the homegroup thing. The first thing I noticed is that Mc Afee would not load on reboot.I got an error message that the application could not load and to reinstall it. I don't think I will be able to install anything since the machine took away my administrator rights and I can't even reset anything on the security tab as suggested on this thread.Short of restoring or uninstalling windows 7,what can i do?

Hi, Please try to take ownership of files/folders to test the issue. 1. Please navigate to the target file/folder. 2. Right-click on the file/folder and choose Properties. 3. Click the "Security" tab and see if your current user is listed in the "Group or user names" list. If not, please click Edit-> Add button, type the name of your current user in the "Enter the object names to select " box, then click "OK" to add this group. 4. Select the user from the list and then check the "Allow" checkbox next to "Full Control". 5. Click the Advanced button and click the "Owner" tab. Then, press "Edit" button. 6. Select current user from the list and check the "Replace owner on subcontainers and objects" checkbox. 7. Click "OK" to save changes and wait for Windows 7 to transfer the ownership of all the objects on the partition. 8. Click OK again to save changes and exit the Properties window. 9. Test the issue again. Does it work? Thanks.