assuming your pc is a relatively new XPS 8930 (you did not say which model except that you posted question on XPS forum), try do a fresh clean install of Windows 10. maybe your wireless and LAN drivers or something else got corrupted.  Do you use speed test to check download speed?

Low disk space

Low Ram size aka 4 gigs instead of 8 or 16

Failing hard drive

Malware

Microsoft Safety Scanner is a scan tool designed to find and remove malware from Windows computers. Simply download it and run a scan to find malware and try to reverse changes made by identified threats.

• Download Microsoft Safety Scanner (32-bit)

• Download Microsoft Safety Scanner (64-bit)

https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download

clean install from OEM DVD on brand new hard drive can make a pc seem like new and much faster.

https://www.amazon.com/Seagate-BarraCuda-Internal-Drive-3-5-Inch/dp/B07H2RR55Q

https://www.newegg.com/microsoft-windows-10-home-64-bit-installation-recovery-disc-only-no-license-key-included/p/N82E16832350237

dock can be used to recover data

https://www.amazon.com/ORICO-Duplicator-Function-Protocol-Supported/dp/B00JJEUL5W

Generic Keys can be used to install but not activate.

Win10 Home YTMG3-N6DKC-DKB77-7M9GH-8HVX7

Win10 Pro     VK7JG-NPHTM-C97JM-9MPGT-3V66T

If your system came with windows 8.1 or newer it wont ask you for a key.

Windows 7 COA keys can be used to activate once online as long as you install HOME or PRO based on what the COA key says.

XP and Vista Keys do not work for 10.

COA KEYS