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.pdf files hosted on IIS 7.5 lock up when downloading in firefox

This issue now has a hotfix however, if you don't want to take a performance hit that this hotfix causes then you can simply do the following to solve the problem with pdf files and IIS 7.5

  1. Open "IIS Manager" on your server
  2. Select your service instace
  3. Select "MIME Types" under IIS
  4. Select ".pdf" then click "edit"
  5. Chenge the MIME type from "application/pdf" to "application/octet-stream"

This will cause the web server to treat the file as a download instead of a pdf application. From IE8 pdf files will open as normal, in firefox it will first download the file in full then open it.

How to merge duplicate contacts using microsoft outlook

First thing you should do is verify that your contacts in outlook sync with any other device you have contacts on. You can do this with MailSync+ or other similar solutions.


Now open outlook and select your contacts folder, then changing to list view will make this much quicker.

  • Select a duplicate entry and use Ctrl+C (to copy the entry)
  • Select the entry you would like to merge the duplicate into, use Ctrl+V and it will tell you of any differences. At which point you can choose to accept the changes or cancel.
  • Go back to the duplicate and use Del to remove it.

That's it you're done.

you can also use the import merge method for bulk duplicate entries.

Cannot access IP on windows 2008 R2 server from external network

This problem can occur two way, one is cause by the server not updateing your gateway routers arp tables. You can solve this problem by logging into your router and clearing the arp tables. for instace, on a cisco router your would do the following:

using serial or hyperterminal if available

  • connect to your router
  • password: (enter password)
  • router> enable
  • password: (enter password)
  • router# clear arp
  • router# write mem
  • router# exit


The other problem is caused when using Network Load Balancing (NLB) on windows 2008 / 2008 R2 Server

For more information on this issue use these links: