strange lag-like weirdness

[M^tster]

Anyone have any clue what would be the issue if:
You netgraph shows giant green blocks, and wont  turn right or left everything slows down and the game stutters? up and download speeds are normal, no packet loss..no other devices using excesive bandwidth.. 

This is not happening to me, but to someone i know.

[m4$73r j14u]

Virus.

[M1SERY]

 Yeast infection.

[yahoo]

You netgraph shows giant green blocks

ya mean like this?

[PANTONE 7717C]

Do some searching on the subject of botnets. Be careful when your antivirus has ever found a trojan-downloader because that's usually the beginning of unexplainable 'lag' problems and system slowdowns. Botnet masters secretly take control of computers and use these infected machines in malicious activities such as emailspam, phishing and whatnot.

check.botnet.nu  Here you can check if your IP is in their database. (This only tells if you are a part of the specific "Pobelka" botnet or have been in the past.)
free.antivirus.com/us/rubotted/index.html  => RUBotted  This tool will monitor your computer for potential infection and suspicious activities associated with bots. (If after a few days this doesn't report anything while you're still getting hangups then don't forget to uninstall the program, just to keep things clean.)
Try this also: http://www.avira.com/en/download/product/avira-antivir-rescue-system  Download the .iso version and burn to cd. Restart comp and enter the BIOS to change Boot priority to boot from CD/DVD first. (This program is like an anti malware/spyware, only it completely bypasses loading Windows.)

[edit]  I just heard D3v finally had a tech guy come over who tested all the lines and found that too much power was coming to modem from a splitter. After removing the thing it seems all is well now. Go figure.