I'm stumped as to why one of my computers gets TERRIBLE broadband speeds late at night, and is OK in the morning.
I checked for a scheduled backup or drive scan. There are none.
Speedtest.net shows 1.1 MBpersec down and no upload at all. This typically starts at about 11:30pm and goes into the early morning hours. By 9am it is back to 7mbps down and 2.4mbps uploads.
While this is happening, another computer on the network can get 24mbps down abd 4mbps up.
So it's not the cable provider.
Another thing, the affected computer takes 20 secs to see the router admin page, or the cable modem admin page.
The other computer can see the router and cable modem in an instant while this is all happening. It is fine.
I ran process explorer and only 1% of CPU was in use. Memory was fine, and the network traffic was minimal while the computer is crippled.
BOTH computers run Norton Antivirus and it is up to date. I typically use Google Chrome because I like the "sandbox" design that limits malware access.
Any ideas how to find out why this computer gets so slow?
It's a quad core Duo on an Asus P5Q.
Thanks for any ideas!