Windows Vista Slow Network Problems

Maybe you have already encountered the strange behaviour that it takes much longer to copy large files in Windows Vista than in Windows XP. You thought that the change from XP to Vista would at least be not a disadvantage speed wise but Vista somehow seems to have a problem copying large files. This happens especially with mapped drives but it could also be that you witness network disconnects.

The problem is caused by a new feature called Auto Tuning which is by default enabled in Microsoft Windows Vista. What Auto Tuning does is that it reacts on changes in the network by tuning the receive windows size. The solution would be of course to disable Auto Tuning in Vista. Some users reported that disabling Auto Tuning had a positive effect on their ability to connect to services such as Windows Live Messenger which did not work before.

To disable Auto Tuning and speed up the copy process and avoid timeouts and disconnects do the following:

Open a command prompt and type the following: netsh int tcp set global autotuninglevel=disabled

once you receive the ok, restart to activate and you should notice a difference.

if for any strange reason you would like to re-activate it use the code below.

To turn it on again: netsh int tcp set global autotuninglevel=normal

Firefox running very slow

Problem: You cannot imagine life without Firefox but over time, your favorite browser keeps getting slower and slower.

Not only is it slow, Firefox sometimes hangs for no reason, consumes a large amount of memory and CPU usage can climb to 90% or more when you have multiple tabs open simultaneously.

You have uninstalled most of the extensions and toolbars, deleted all the cookies and internet temporary files, cleared up the file download queue and disabled the background check for software updates – but none of this has helped you speed-up Firefox.

Solution: This is a common problem especially if you have been running Firefox for some time – I don’t know why Firefox slows down but here’s a small trick to rejuvenate the aged copy of Firefox without doing a fresh install.

Step 1: Start Firefox and export your bookmarks as a file on your hard-drive (we’ll need them later).

Step 2: Type firefox.exe – P in the Run box of Windows. (see screenshot)

Step 3: Click the Create Profile button without making any modifications to your existing profile (which is normally called “default”)

Now when you Start Firefox in the new profile, you are very likely to be impressed with the speed. You can import the bookmarks that you saved in Step 1. If you have made any changes to the Firefox Dictionary, copy the persdict.dat word list file from the old profile folder to the new one.

Yes, there won’t be any old Firefox add-ons in the new profile but the browser will be extremely quick and won’t hog the CPU – just the way you want Firefox to run on your computer.

And if you ever need to revert to the old profile, just type Firefox -P again and click the old profile. Nothing is lost.