Taskbar issue on HPz2G9 desktop

[Allen789]

The taskbar seems to be out of whack: too long for the Asus 32 inch monitor?  At 150 scaling (recommended for the monitor) the taskbar is not visible--it's like a thin line at the bottom of the screen.  At 225 scaling it is slightly visible, but icons cannot be seen.  At 250 scaling about half of the icon is visible on the taskbar.  Never seen anything like it on any computer.  The 3 year old G9 is i7-12700K with 128 gb ram and was purchased used on Ebay.  Could the previous owner have done registry changes to attach a huge monitor to the computer?  How do I get the computer back to normal.  I have done sfc /scannow and DISM on command prompt--nothing changed.  The windows 11pro works okay and is fully updated.  250 scaling is way too big for internet etc.   

[Qsaifoddin]

Hi @Allen789 

Thank you for posting in the HP Support Community. I understand that your Z2 G9 (purchased used) is showing a taskbar that appears as a "thin line" or is cut off at the bottom of your Asus 32-inch monitor, specifically at the recommended 150% scaling.

Since the standard sfc /scannow and DISM commands did not resolve the issue, and considering the behavior changes with scaling, this does not look like a corruption issue. It is likely due to Display Overscan or a Registry modification left over from the previous owner.

Please try the following steps in order:

1. Check for "Overscan" (Most Likely)

If the taskbar looks like it is physically "off the edge" of the screen, the monitor might be zooming in on the image. This is common with 32-inch monitors connected via HDMI.

• Monitor Menu: Open the On-Screen Display (OSD) menu using the buttons on the Asus monitor itself. Look for settings named Aspect Ratio, Overscan, or Just Scan. Ensure it is set to "1:1" or "Full".

• Nvidia/Intel Control Panel:

  1. Right-click the desktop and open the Nvidia Control Panel (or Intel Command Center).

  2. Navigate to Display > Adjust desktop size and position.

  3. Look for the Size tab and use the "Resize" tool to shrink the desktop until the corner arrows fit perfectly on your screen.

2. Check for Legacy Registry Settings (Specific to "Thin Line" issue)

You mentioned the unit was purchased used. A common modification in Windows 11 to change taskbar size involves a registry key called "TaskbarSi". If the previous owner set this incorrectly, updates can break it, causing the "thin line" glitch.

• Press Windows Key + R, type regedit, and press Enter.

• Navigate to this path: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

• Look for a key named TaskbarSi.

• Action: If you find it, right-click and Delete it.

• Restart your computer immediately.

3. Connection Type

If you are currently using an HDMI cable, I strongly recommend switching to a DisplayPort cable. DisplayPort communicates resolution data differently than HDMI and typically prevents the "Overscan" issues mentioned in Step 1.

Please let us know if any of these steps resolve the issue.