Network Connections folder empty

Originally posted on TCAT Shelbyville - Technical Blog:

Is your network connections folder empty?

First check the device manager.  Load the drivers if necessary.  You may see Ethernet Controller with an exclamation mark on it or a red X.   Find the drivers disk or download the driver and load the driver.

No problems in the device manager?

Uninstall and reinstall the drivers.  Reboot.

Check all of the network services under services.msc  (Default services on Windows 7 can be found here – you may need to check all of the services)

No luck?

Go to a command prompt as an administrator.

Type –

regsvr32 netshell.dll
regsvr32 netcfgx.dll
regsvr32 netman.dll


Still not there?  Try this.

  1. Click Start , click Run , type regedit , and then press ENTER.
  2. Locate and then click the following registry subkey:
  3. Right-click this subkey, click Export , and then save the selected branch in a file.
  4. Click the Network subkey again, and then delete…

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Find and set your optimal MTU setting to improve your connectivity

Originally posted on TCAT Shelbyville - Technical Blog:

MTU Ping Test

Want to determine the optimal MTU for your ISP connection?

  1. Go to Search or Run (Windows 7 vs. XP)
  2. Type in cmd. Hit the enter. A Command prompt window will open.
  3. Type ping -f -l 1500 and hit Enter (or a website of your choice).

  1. Look at your results.  Does the packet need to be fragmented?  Try lowering the size of the packet in increments of 8 to 10) until you have a packet size that does not fragment.

  1. Once the packets are not fragmented, begin increasing the packet size from the number you find in small increments until you find the largest size that does not fragment.  You will need to add 28 to that number  for IP/ICMP headers to get the optimal MTU setting.
  2. If you get 1410 as the largest packet size, add 28 to that number and 1438 would be your…

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Network troubleshooting with Netsh

Originally posted on TCAT Shelbyville - Technical Blog:

Every have that laptop or netbook that connects to your computer but won’t go online at another location? You can quickly rebuild the IP stack and force the computer to get online at another location by typing the following command:

netsh int ip reset C:iplog.txt

Of course if you have a computer that won’t get online even if it has an ip address, do several things –

  • Click Start Menu, type cmd in the search box or run box ( Hold down Ctrl + Shift and hit Enter)Type the following commands, each followed by pressing enter.
  • ipconfig /flushdns
  • nbtstat -R
  • nbtstat -RR
  • netsh int reset all
  • netsh int ipv4 reset
  • netsh winsock reset catalog
This will rebuild the tcp/ip protocol stack (fully)

After rebooting, run a command prompt as an administrator and type:

  • netsh interface tcp set global autotuninglevel=disabled


How about tweaking your network for a little more speed?

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Optimize Your Windows 7 or Windows Vista Internet Connection

Originally posted on TCAT Shelbyville - Technical Blog:

While this post is for advanced computer users, it shows the inner workings of how an internet connection works.

Disable Remote Differential Compression (Many users state this speeds up file transfers and network transfer speeds – although many question this)

To Optimize your internet connection –

From a command prompt (administrator) type the following commands –

netsh int tcp set heuristics disabled
netsh int tcp set global rss=enabled
netsh int tcp set global chimney=enabled
netsh int tcp set global autotuninglevel=restricted
netsh int tcp set global congestionprovider=ctcp
netsh int tcp set global ecncapability=disabled
netsh int tcp set global timestamps=disabled

To return to your default settings, go to a command prompt as an administrator and type –

netsh int tcp set heuristics default
netsh int tcp set global rss=default
netsh int tcp set global chimney=default
netsh int tcp set global autotuninglevel=normal
netsh int tcp set global congestionprovider=default
netsh int tcp set global…

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Clean your MSSQL TempDB file and more

If you write an odd query on your SQL server, you may have made your tempdb large. This can cause problems by filling your disk. While Tempdb stores temporary tables and cached information that helps with the performance of your server, you may want to shrink the table and allow it to rebuild – thus making your server perform better. Here’s a query that may help.

The apostrophe ‘ may need to be changed if you copy and paste this query.

use tempdb

dbcc shrinkfile (‘tempdev’)
dbcc shrinkfile (‘templog’)

SELECT name, size
FROM sys.master_files
WHERE database_id = DB_ID(N’tempdb’);

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Network named incorrectly under Network and Sharing Center

Have you connected and reconnected to a wireless or wired network and noticed the network adapter is now named wrong?

There’s an easy fix.

  • Open the Network and Sharing Center
  • Click on the Active Network icon (see below).

Click on Icon

  • Type in the network name and choose an icon


  • Click OK
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From help desk to an IT Security Officer

When you first start IT, you wonder how long you may be at a service desk job.   If you do your time, you’ll gain the experience that your company or others want.    We love telling our students’  stories about the growth in IT and they often stop by or call.


I’m always surprised by phone calls from past students who think of us and call to update us on their careers.  While we have a complex program,  we are with the students 30 hours each week for approximately 15 months and it doesn’t seem like enough.   With technology growing so rapidly, we can only give our students the tip of the technology iceberg.

Colt Lane came to our program about five years ago.   His call today reminds me of how IT people can really change their lives.  Highly motivated and with a desire to learn, Colt is now the IT Security Officer and IT Manager of Network Services at a large financial institution.  His professional growth from help desk to where he is at today is to be commended.  Now that is change.

Colt has grown so much professionally that when I look at him I  see a different person.  I  see someone who is a peer – someone who is tackling IT head-on, someone who is successful and someone who will continue to grow.

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