system
Given the following post, respond as if you're commenting on Reddit:
human
[Dresden Files] Would Harry Dresden be able to use a computer if he barged into someone’s home?

In the Dresden Files series, technology made from “around World War II and beyond” has a tendency to go haywire when around magic, whether that be spells or just the presence of a wizard. The level of magic and the technology is related, in that higher levels of magic will burn out the tech more quickly, and more advanced technology has a higher chance of being shut down when around magic of any level. 

Another important rule in the Dresdenverse is the idea of thresholds; that is, going past the front door into someone’s home. If a wizard is invited in, their power remains as it is. If they are not invited but enter anyway, their magical powers are greatly reduced. 

Harry Dresden is a wizard with a lot of raw power, to the extent that the only car he drives around is a 1930s VW Beetle since it’s the only thing he can keep running for any length of time. However, if he were to barge into someone’s home without being invited, would his power be reduced enough to the point that he could use a computer or a smart phone?
gpt
No. The exact scenario you describe happens in *Cold Days*, and he causes a computer to crap out after spending two seconds in the room with it.

>!When Harry breaks into Butters' house to steal Bob after becoming the Winter Knight, Bob is watching porn on Butters' gaming rig. Harry walks into Butters' computer room, and two seconds later Butters' computer craps out, alerting Bob to Harry's presence.!<