Ncomputing devices not working on Dell 755 & 745 workstations.
We tried implementing the Ncomputing devices into our school and were constantly bombarded with BSOD errors and end point devices not turning on.
I tried for weeks to figure out why machines would not run stable, looking at Fix 1 in my opinion would be an acceptable solution.
Similar problems appeared when running Clickview Manager on a Dell 755 with a Hauppauge video card, just BSOD’s all the time.
These fixes below worked for us and applied to Dell Optiplex 745 [BIOS version 2.0] and 755 [BIOS version A10, A3/A4 should work as well]
Version of Ncomputing software/drivers I am using which didn’t pop up with errors on install was “NCX 2000-XP Version 4.03.081 [05-05-2007]
Version 4.03.0098.1 of software came up with CRC fail errors on install:
win32k.sys;
kmserv.exe;
kmmm.dll;
kmupdate.exe &;
kmlogon.dll
Common symptoms:
Blue screen of death on “win32k.sys” and dumping of physical memory;
NTDLR or some form of system file being corrupt after the install of Ncomputing software/drivers after restart;
Machine running slow;
Snap in console for Ncomputing + Administrative tools disappearing, error loading modules.
Fix 1 applied:
X300: Dell Optiplex 755: System will not boot / Stations will not start
There is a known issue in Optiplex 755 hosts, caused by a shortage of IRQ’s. This issue manifests in a failure to boot on the host computer, or some or all of the terminals. This can be resolved by disabling the serial and/or parallel ports in the BIOS to free up IRQ’s.
Fix 2 applied:
Incompatible Module win32k.sys / MS update KB941693 Incompatibility
Although this error message may or may not affect our product functionality it will continually prompt you with this “Module” error whenever the system starts up.
To remove this error message, you have to uninstall the Microsoft Security update “KB941693″ through add/remove programs in the Control Panel. Make sure you select “Show updates”, scroll to the “KB941693″ update and hit “remove”. It will prompt you stating that other updates may be dependent on this update. Disregard this, and finish the removal. The system will need to be restarted and the update should then be successfully removed. Make sure you turn off Auto installation of updates through “Automatic Updates” so that the update will not be reinstalled inadvertently.
last options tried but wasn’t essential:
1. X300 – Dell Optiplex 755 Desktop form factor – No sound when 2 X300 cards present. To resolve this issue, please downgrade the BIOS to revision A03. When the BIOS is then reset to default settings, sound works with 2 PCI Xtenda cards installed. To find the A03 BIOS revision, please visit the following website http://support.dell.com/ and search their database by model, specifying the Dell Optiplex 755. Once there, you can find previous versions of all downloads available for the Optiplex 755, including the A03 BIOS revision;
2. Using sfc /scannow and checking of windows system files.
Note if you have problems with “sfc /scannow” asking for windows CD and keeps asking no matter what you do, try copying ‘i386; folder to C:\
* Open the registry editor and go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup
* Highlight the Setup folder.
* On the right pane, locate the SourcePath.
* Double-click the SourcePath and replace the drive letter in the box to C:\ (if you copied the files to your C:\ drive). Make sure it’s C:\ and not C:\i386.
* Close the registry editor.
* If the system ever needs files from the i386 folder, it will automatically look in the C:\i386 folder.
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