Is it just the browser or it's slow overall ??? Like reboot times? other apps closing/opening time ?  Since  you have a backup computer I would go for a Factory RESET with latest Dell image.  F12> Supportassist OS Recovery > RESET > RESET and update.    If it's just the browser issue, try disabling/enabling hardware accelaration and update the browser.  For updating browser : chrome://settings/help For disabling/Enabling hardware acceleration chrome://settings/?search=hardware One last thing Open Killer Networking center/Killer control center and disable all enhacements :   
Hello, I have buy This Dell XPS 13 one year ago, It was working almost fine, but recently it speed become very slow when I was edit my WordPress blog. The device itself nice and cool but Last week it really disappoint me. i checked my internet connection many time reset my modem but the same thing again happen with me after multiple try. I do not open lot of tab at the same time, only 3 to 4 tabs has open while working. I have an extra laptop (lenovo thinkpad 12), I try work on it and it was working speed was like a fighter jet plan. I need to use lot of plugin to customize my blog which I think can be heavy or put extra load in it. I have a list of multiple blogs which I try on it and it become extremly slow. Is there any issue with Dell XPS 13 and something else like setting? I don't think Dell XPS has something wrong, But I need your help. Thanks.
Dell XPS 13 working slow during work on my wordpress panel edit