text: how can i make windows xp pro run faster on a network? i am it support at my job. i have a computer that loads up really slow. i've tried ipconfig /release /renew thinking it was dns issues. error log says it's having trouble confirming domain or user. been  trying to fix for 3 months. i don't have the option of deleting and readding her to domain. too much info on email and other issues. have you tried connecting her to the domain on a different computer?  have you tried replacing the nic?  hve you tried updating the nic drivers?  i'm leaning towards nic issues.  let me know what it turns up to be.  this is interesting...