I have been facing a strange net speed problem, on a site with 2 desktops and 1 laptop all with Vista SP2 and fully updated, and all technically about the same generation ab. 2 max. 3 years old.
The other desktop and the laptop behave all well on a nominal 24/1Mbps ADSL-line via an older ADSL2+ modem/router through both WLAN and LAN connection, reaching acceptable speeds of some 6-15Mbps on dl and 600-800kbps on ul, but the other desktop is crawling on some 400-700kbps on dl and about the same level or even higher on ul. The pings for all are on the same level of ab. 30ms on close test sites and up to 300-400ms on faraway sites.
What could be the reason for this behaviour on the crawling desktop, as a machine besides on WLAN and on same LAN line is working well?
I have been checking e.g.
- no malware or viruses detected on this problem machine by 3 different scanners, just some few cookies
- all cable connectors and antennas on the machines and router are checked tight
- machine antennas are on open space less than 10 metres apart the router antenna
- the net component drivers are updated and also once deleted/renewed on this problem machine
- the ipconfig /flushdns is done
- the disk check with /r is done
- the behaviour is the same with or without Firewall on
- the behaviour is the same with IE8 and FF3
- but, for some reason, I didn't get LSPFix check working on Vista
Please, give me a hint, if there is still something I may have been missing to check.
Thanks in advance.