Hi Nalp and welcome to the WTT forums.
As you know, tracking down the reasons/causes of lag spikes can involve a little bit of work!
Interference with a wifi signal can come from many sources. In addiition the signal can be attenuated by lots of things as well….. distance between the wireless access point and the wireless receiver, and or the presence of metalic objects, walls etc that impede the passage of the signal.
Here's a suggested plan of attack:
1 move your computer to within 2 metres of your WAP…. check to see if there is any improvement.
2 if no improvement then check for interference from:
1. A neighbour's WAP operating on the same or adjacent wifi channel (change channel if possible and choose one that is not "shared")
2. A device that is operating on the same or similar frequencies to your WAP… these include, microwave ovens, dect phones baby alarms etc.
3. Old Firmware in your WAP or Router… check for updates in the firmware and in your computer's wireless network adapter (update and or roll back as required)
4. Old bluetooth equipment, old phones etc… keep them well away.
5.Intermittent faults in your home wiring and the use of home networking over "home electrical mains voltage wiring"
6. Using security (encryption) on your home network but an old router/WAP that's been uplifted from WEP to WPA2 may have an effect on performance but should not normally cause a disconnection.
7. Check to see what processes are running when the lags occur, you can check this via Task Manager and see what applications are using up your CPU cycles…If you prefer a more comprehensive then download and run process explorer:
http://technet.microsoft.com/en-gb/sysinte…s/bb896653.aspx
8. Many programs "call home" to update themselves, including Windows Update and of course your AV+AS applications. Whilst any application is updating or checking in its likely to cause a lag, so step 7 is very important from a diagnostic point of view.
9.The indexing service can sometimes cause this sort of problem so check this
10. If anyone has installed P2P file sharing applications (torrents etc.) then this is a likely cause. With access through your firewall, it's practically guaranteed to slow things down and create lags at the very least. Along side file-sharing comes malware (not always, but a lot of the time!) so a thorough check for these sort of applications and code on your computer should be done.
11.Have you tried flushing your DNS cache, clearing browser and other caches, checking for sufficient free disc space, defragging etc ??
12.Running this code before the lag starts and then again immediately the lag starts can be useful information. From a command prompt with elevated privileges (right click and select "Run as Administrator" execute the following:
cmd /c "ipconfig /all > postme.txt & ping bbc.co.uk >> postme.txt & notepad postme.txt & del postme.txt"
Note please use "copy and paste" (Ctrl+c and Ctrl+v) for these commands,(everything in blue) as this will automatically make sure you get the syntax correct!
13. Post back the contents of the two notepad windows that will open and we will advise the next steps.
14. Boot into safe mode with networking via the F8 procedure and try your internet for a short test..do the lags still happen? (be careful as your protections (AV etc.)will not be working properly in this mode)
15.Create a new user account via control panel "users accounts" log into this new account from a cold boot, check for lags again any difference?
16 Does the lag still happen when connected via ethernet cable?
17 Please time the lag over a number of cycles and advise.
Post back with the results/outputs from all the above and we will advise the next steps.
Regards
paws
