Uninstalling pre-existing installation and cleaning up PATH also did not help.
Good luck PS: Running on Windows 8 Same problem here, on Windows 7 64Bit. Deleting the folders and running heroku again did not work for me, nor did renaming/removing the file.
Turn off any antivirus or anti-spyware program If you are using an Administrator account and the problem persists, turn off any antivirus and anti-spyware program temporarily. You can update drivers manually, but it could take forever.
This will work if the update is blocked by these program. Go to HKEY_LOCAL_MACHINE\SYSTEM\Current Control Set\Services\USBSTOR. You can also update drivers through Windows Update, which may fail to provide new drivers.
But with Professional version, you can even update all drivers with 1 click. More importantly, you will enjoy Free technical support guarantee and money-back guarantee.
You can ask for further assistance regarding any driver issue.
Or, if you are old enough to wear the big boy pants and know a bit about how to protect your computer, another reason for this error may be because of a block caused by your firewall or antivirus software.