is this because of Win 8.1 64bit BS?
https://support.google.com/chrome/answer/2898334?p=ui_download_errors&rd=1
Download errors & warnings
When a download fails, an error message may appear on the download bar at the bottom of your browser. A longer error message will appear in the Downloads page. Chrome also warns you about unusual or potentially dangerous downloads.
Common download errors
Blocked: Security settings on your computer blocked this file. Windows users: The file you attempted to download was removed by the Windows Attachment Manager. Your computer may be set to block all downloads, so check your Windows Internet security settings to ensure you’re able to download files.
Virus scan failed: Antivirus software failed unexpectedly while scanning this file. Windows users: The file you attempted to download was removed by the Windows Attachment Manager. Learn more about what can cause "Virus scan failed"
Insufficient permissions: Cannot save due to insufficient permissions. Please save to another location.
You may not have the necessary permissions or some other application, typically antivirus software, was accessing the downloaded file at the same time as Google Chrome. Try again later or try saving to a different location. Learn how to change download locations
Network error: Unknown network error. There was a problem with the network during the download. Try again later.
Download error: There was a problem during the download. Try again later.
No file: The server could not find the file. The file you attempted to download may not be valid. Contact the server administrator.
Server problem: Unknown server error. Try again or contact the server administrator.