Vista - Microsoft update KB905866 and internet connection

My PC had been working fine until 10th Sept when I downloaded some new updates from Microsoft, at once the internet connection slowed to a trickle.

I contacted my ISP but after running some tests they said their signal strength was good and suggested I had a virus or a trojan. Cue outbreak of paranoia and much scanning with various programmes (which all had extreme trouble downloading their updates), after they all came up clean - apart from a few minor trackers - I posted a thread in the 'Network and Internet' forum and was advised to check the Events Viewer.

This showed a flurry (about 50 or so) Yellow Flags saying that the last updates may not have been applicable to my system, after some Google searching about these updates and the internet I narrowed it down to KB905866, but even after uninstalling the internet connection is still a trickle.

I tried uninstalling all the 10th Sept updates but that made the IE8 very unstable (sudden crashes and hanging), so put them back on just to get back to where I was.

I thought I'd set the PC to create Restore points but there were none, but one of the posts on another Forum about this update says it can wipe Restore points.

I was using ZoneAlarmExtreme when this started, but have now uninstalled it and am running Kaspersky 2010 and there are no conflicts of firewalls etc.

Has anyone else had this sort of trouble, and how can it be sorted?

Ashtree

two things you can do with out too much trouble

first run a system file check (start. search,type cmd, type sfc /scannow) to verify and repair the system files.

when its done it will give you results.

let us know what they are


ken

Thanks for the reply; I'll do it when I get home later.

1. right click on "network" icon in your system tray. Click on "Diagnose and Repair". What does that show?

2. if nothing from that, and you have a 1GB adapter, go to network adapter, properties, advanced, speed duplex settings, then change from auto negotiation (1 gig) to 100 meg half duplex (10/100). See if that makes a difference.

Try reset the whole TCP /IP protocol How to reset Internet Protocol (TCP/IP)

I tried to do that but was told I had to be logged in as an Administrator to a console session; I am an administrator but can't see how to open a console session, any clues?

To do that you have to elevate cmd.exe Elevated Command Prompt
Have you tried reset TCP from my post 5?

Thanks for the Elevated Command heads-up.

I ran the TCP reset both automatically and manually (twice, once in ordinary command mode which had no response and then in Elevated mode which worked) but there is no significant improvement in performance even after reboot.

Whether this is relevent or not in Device Manager the A6to4 adaptor has a Yellow Flag on it, but when I click for Hardware changes or Driver Update I'm told that the device is at the top of it's game (no roll-back as the system is 2 months old)

I know this isn't relevent if IVP6 is disabled, but it seems odd that the Warning Flag is there.

I tried that but I must have an adaptor lower than 1GB as when I changed the Auto-negotiation the internet connection cut out completely.

Ran the scan, but after the lengthy process (well, about 10-15 mins) the message was along the lines of "No Integrity Violations Found"