This number is very active right now: +1 844-395-6575
I don't have the popup but you can just say you are having computer problems and they will go along with you. I even used a popup from another scam and they fell for it.
Here are their IP details:
Details for 182.71.183.186
IP: 182.71.183.186
Decimal: 3058153402
Hostname: nsg-static-186.183.71.182.airtel.in
ASN: 9498
ISP: Bharti Broadband
Organization: Bharti Airtel
Services: None detected
Type: Broadband
Assignment: Static IP
Blacklist:
Continent: Asia
Country: India in flag
State/Region: West Bengal
City: Kolkata
Latitude: 22.5697 (22° 34′ 10.92″ N)
Longitude: 88.3697 (88° 22′ 10.92″ E)
Postal Code: 700059