Next to this you can also check out if there are some folders that have rights assigned to your username and not to mentioned users group. You can use icacls.exe to perform the check.You do an SysInterneal's AccessChk for users "Users", "Everyone", "Authenticated Users" and "Interactive". For the directories "Program Files" , "Program files (x86)" and "Windows".
In past I've used this command to perform the check:
icacls c: /findsid Username /t /c /q
