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By Chrysostomos Psaroudakis on Wed, 06 Sep 2017 22:32:29 GMT

The cause of this seems to be that when a user logs out from Windows 10 sets some essential registry keys to read only. When they logon again these keys are in the wrong state and packaged applications including Edge fail to load. But this seems to be on of the causes, while MS has no fix released since version 1511.

The below is a walkthrough for working this out.

By Chrysostomos Psaroudakis on Wed, 09 Mar 2016 18:34:05 GMT
There are times that moving personal computers to corporate environments, without applying a BYOD policy, drive us to replace the preinstalled OS of our computer. For instance there is the need to upgrade our OS from Home to Professional edition in order the computer to join a domain.
By Chrysostomos Psaroudakis on Sun, 07 Feb 2016 20:49:06 GMT

We will need:

  • An ISCSI enabled Network Attached storage, like QNAP.
  • 2 PC/Server with equal number of NICs (4+ NICs needed) /RAM and CPU type
  • A working active directory domain on Windows 2012 R2

For proper HyperV operation you will need n+1 NICs where n is the number of vms hosted on the hypervisor.

For the cluster we are about to build we need 3 NICs on each node of the cluster, plus n NICs for the n number of VMs we are about to host.

Make a good sketch of your solution, in order to have nic ips/configuration handy at all times during the installation or troubleshooting.

By Chrysostomos Psaroudakis on Sat, 06 Feb 2016 00:16:01 GMT

Σε πολλές περιπτώσεις θα δείτε ότι είναι αδύνατη η εγκατάσταση Ethernet Καρτών κατασκευή της Intel ή Intel –Gigabit σε Η/Υ με λειτουργικό Windows Server 2012 / 2012 R2.

Η εγκατάσταση των driver σταματάει επειδή το software του driver δεν μπορεί να εντοπίσει Ethernet κάρτες της Intel.  Τo πρόβλημα υφίσταται διότι το πρόγραμμα εγκατάστασης της Intel προσπαθεί αυτόματα να εγκαταστήσει τον driver, ενώ θα έπρεπε να αφήσει το λειτουργικό σύστημα να αναλάβει την διαδικασία της εγκατάστασης. Επίσης έχει προστεθεί μια λίστα εξαιρουμένων συσκευών προς εγκατάσταση, που οδηγεί στο πάγωμα της εγκατάστασης των οδηγών.

Ο λόγος που γίνεται αυτό δεν είναι γνωστός και λογικά γίνεται στο να αποτρέψει χειριστές να εγκαθιστούν οδηγούς που ενδεχομένως να μην λειτουργούν σε ορισμένα setup

By Chrysostomos Psaroudakis on Fri, 05 Feb 2016 22:39:30 GMT




DEFENCO ACRITAS Mini Heli UAV, featuring CBRNE sensors from NCSR Demokritos, IR and Day Hitachi Lens cams, FPV, Auto Pilot. Prototype for #ACRITAS project.#UAV#Helicopter#CBRNE#BorderSecurity. Special thanks to our partners Defenco, SATWAYS, Demokritos, KEMEA, NOA, EMC, HAI, University of Aegean#CreativePeople.gr
By Chrysostomos Psaroudakis on Mon, 15 Dec 2014 23:07:22 GMT

Recently we encountered a weird case which had to do with Windows Server 2012 R2 booting. After having a “few” updates required for our Hyper-V and Backed Up we restarted the server.

Upon rebooting, BOOTMGR seemed to be damaged and we couldn’t get it run. For some reason (which was revealed later) the backup overwrote \windows\BOOT, due to faulty assignment of sata cables on the motherboard.

Thus, we tried out a few ways to recover boot files needed to get it back on the road again with the less possible collateral damages.

We tried 3 ways. All of them will be described below, apart from repair from CD/.iso tried already, which didn’t help…

For all below actions, you will have to boot from the equivalent OS CD / .iso and enter Command Prompt from the REPAIR list.

By Chrysostomos Psaroudakis on Fri, 13 Jun 2014 08:13:39 GMT
Failing to boot VM running an Exchange 2003 but Mailboxes are saved. Backup present
By Chrysostomos Psaroudakis on Thu, 24 Apr 2014 21:35:07 GMT

host yy.com [XXX.XXX.XXX.XXX] said:

    550-Verification failed for <username@xx.com> 550-No such person at this

    address" 550 Sender verify failed (in reply to RCPT TO command)

By Chrysostomos Psaroudakis on Sat, 12 Apr 2014 02:25:29 GMT
I came up to this error yesterday with a W2k3 SP2 DC/Exchange (also seen on W2k8).Volume shadow copy creation: Attempt 1. "COM+ REGDB Writer" has reported an error 0x800423f4. This is part of System State. The backup cannot continue.

Error returned while creating the volume shadow copy:800423f4
Aborting Backup.

----------------------
The operation did not successfully complete.

By Chrysostomos Psaroudakis on Fri, 11 Apr 2014 23:55:58 GMT
Sharepoint 2013 with IE crashes every 30 seconds...again and again how annoying while trying to test a new goodie such as sharepoint....

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