can not open download file, what should i do?

[HanzGruber]

after downloading file several times to my Windows pc i cant open it like a normal download file

"C:\Users\soldi\Downloads\Unconfirmed 661797.crdownload"

what program do you use to open it? thanks

[C-Beats]

That extension is typically used as a storage buffer for something being downloaded for a download that has not yet completed. The browser you're using to download the file didn't completely download it and close/rename the file which it does once completed. Unfortunately the file as it is  will be pretty useless to you.