Author: Bob Lin

Q: I have Windows 10 Home edition. However, when I re-install it, I used a Windows 10 Pro DVD instead of Home. How can I downgrade Windows 10 Pro to Home?

Chicagotech.net:  You may try this: 1. Run regedit by opening Registry Editor. 

2. Navigate to key HKEY_Local Machine > Software > Microsoft > Windows NT > CurrentVersion

3. Change EditionID from Pro to Home.

4. Change ProductName from Windows 10 Professional to Windows 10 Home. 

5. Browse to key HKEY_Local Machine > Software > Wow6432Node > Microsoft > Windows NT > CurrentVersion, change the EditionID and ProductName to Home.

6. Close the Registry Editor

7. Insert the Windows 10 Home installation media, do an in-place upgrade by launching the setup from desktop (not booting with Windows 10 Home install media)

8 .When asked select what to keep(settings, personal files and apps, only personal files or nothing) Windows 10 Home in-place upgrade will be done now.

If above doesn’t fix the problem, you must do clear re-installation.

Q: I try to re-build RAID 5 using Stellar data recovery. However, its scan result shows only small volume with 1.3MB. Why?

Chicagotech.net: You may try Deep Scan as shown below.

If the deep scan doesn’t show all volumes, you may have incorrect RAID 5 parameters. Try different parameters or selelct don’t know.

Q: Recently, some of our computers have a problem to print word.  After we switch the printer driver from Kyocera FS-4200DN KX to Kyocera Monochrome personal XPS Class, that seems to fix the problem. However, now some people have a problem to print email.

chicagotech.net: We fix this problem by switching back to the original Kyocera FS-4200DN KX driver.  The way we do now is install the printer locally using IP address instead of printer server so that the user can switch the print driver by themselves.

Q: We get more and more this problem. When we install Windows 10 update, it take 1 or 2 hour, sometimes, it seems taking forever. What can we do it?

Chicagotech.net: here are some suggestions.

1. Install the updates at night. That will give Windows 10 more time to install the updates.
2. Install the update manually. You can install one update at once.
3. Do install once per week or once per month. Don’t let the updates cumulate too many.
4. Download the updates first and install them manually. Go to this link to download Windows update tool: https://www.microsoft.com/en-us/software-download/windows10.
5. Using WSUS or System Management to push the updates to group computers.
6. Install Windows Update in Clean Boot by running msconfig.

1. Install Windows 10 update using Windows 10 Update Assistant.

restarting solved the Windows update stuck issue while the Windows reverted back to its original state for other users.

Q: When installing Malwarebytes, I get this message: Installation failed: Failed to open service Control Manager DB. Win32 error code 5 or 1726. How do you troubleshooting?

Chicagotech.net: 1. Disabling firewall for a test.

2. disable any security software such as anti virus for a test.

3. Make sure Remote Registry service  is running.

4. Make sure network sharing is enabled.

5. Check WMI on Malwarebytes installation.

Q: My NAS with RAID 5 is broken and need to rebuild it. How do you rebuild RAID 5 without knowing parameters in Stellar Data Recovery?

Chicagotech.net: In this case, you may check Don’t know start sector of drivers, Don’t know Stripe/Block Size, and check all start sectors and block sizes.

Q: My LaCie 5big NAS with RAID 5 can’t start. I am trying to re-build RAID 5, but doesn’t know the parameters. Any one has these information?

Chicagotech.net: Based on our research, LaCie 5Big RAID 5 parameters are

Block size was 128 sectors Parity was left symmetric The raid start was sector 2008125 And the file system was xfs. Here are the example we configure on Stellar Data Recovery.

Q: When sending an email to my co-worker, I receive this Error is [0x80040305-0x0004de-0x00054a]. What could be the problem?

Chicagotech.net: 1. Sounds like his email profile and primary domain account got “disconnected”. Try to close the Outlook and try to send it again.

2. clear the cache in outlook and then send from outlook as well.

3. Outlook repair tool may help you to solve this issue.

4. Corrupted Outlook PST files are the main cause of Outlook 0x80040305 Your server administrator has limited the number of items you can open simultaneously Error. You must have to repair damaged and inaccessible Outlook data first to recover those files. For this recovery step you need to take help of third party Outlook PST repair tool which helps user to restore Outlook emails, contacts, journals, notes etc. One of the most recommended PST recovery tool is Outlook PST repair software. For deleted, damaged, corrupted or inaccessible PST file this tool works immediately and recovers lost PST files.

5. Check the delegate. It may delegate too many people.

Q: I can’t open some JPG images. Do you recommend any software to repair them?

Chicagotech.net: You can try Stellar Recovery. Here are step by step instruction with screenshots.

1. With Stellar Recovery open, click Repair Photo.

2. Click on the option ‘Add File’ to select your corrupt images.

3. Select files you want to repair, click Repair.

4. Once repairing is done, click OK to preview the image.

5. If you can’t review it, click Advanced repair to repair it one more time.

6. Now, click on ‘Save Repaired File’ to save the repaired JPEG files at your desired location.

Q: I can’t access my external USB drive. chksdk shows some bad sectors. How can I fix the bad sectors?

Chicagotech.net: