I got a call from both numbers
(416) 504-6641 and (416) 363-5905
Looked them up and found this page. Seems this scam is common. I'll save the numbers in my phone as "scam" and answer my phone identifying myself as a police officer with the fraud squad next time. Bet they don't call after that.

This Scun Bag did the same y calling and waisting time,just told him to go F%@K Himself... Notice you cant call him back,number is spoofed!

3:30 in the morning waking up my kids, @$$hat!

Got a call from (416) 504-6641 saying they wanted to refund me for the $299 I had paid them in 2014. I said, "oh good, can I get your name and number?" Then he said, "get lost" and hung up. I like the idea of identifying the number as scam and then answering "fraud squad" ;)

Got 7 calls starting at 3:01am to 6:21am. I had the ringer off so I didn't notice. How rude of them to call and bother people at that time. Jerks.

11:30 at night received call from the number, pick it up , some one try to send fax to my cellphone, call them back not a chance, Ops they just call again same nipping sound.

This number called me randomly at like 4am but I was asleep and when I called back this morning it was "busy"

Got a call from (416) 504-6641 wants my credit card info gave him my number then wanted exp dt gave him 10/89 he wants valid exp dt advised him to fix his computer as that is a valid exp date and that card expired

The [***] called my house @ 3:35am...woke me up. My answering machine picked up first then I picked up to listen and heard the person pressing numbers (to interrupt the greeting or something else I presume). Then I said hello and the person just sat creepily in silence on the line for 5 more secs and hung up. I usually don't answer unrecognized numbers but I really wanted cuss out the SOB. When I called the MOFO back it was busy.

Same here...got a call from (416) 504-6641 and right after another call from unknown number....

I Got a call from (416) 504-6641. She said she is from Microsoft Service center and received an error notice from my computer. She asked me to go near the computer and tell her the license #.I knew it is scam. When I ask her to give me her phone # so I can call her back she gave me (845)263-1532. She is from India, I don't bother call her back.

I got a call from (416) 504-6641. The caller didn't respond to me. Simultaneously, I had another two calls from (416) 363-5905 and another restricted number.  No response was there either. The caller, therefore, might be the same person.

Have had calls from this number with the usual "there is something wrong with your Windows, we will fix it". When I laughed and asked them if anyone fell for this scam they swore at me and hung up. Tonight no one said anything. Instead it sounded like I was being transferred from person to person, and the background was very noisy. I guess they aren't competent enough to transfer me to a live person. Good thing I didn't let them fix my computer :)

Got 2 calls a minute apart.  This time they wanted to clean my ducts.