Windows Script Host access is disabled

Which script is being run at startup is the real thing to be looked into. You may want to run a full scan using Malwarebytes Anti-Malware and Junkware removal tool to eliminate unwanted scripts and malware.

To check what's being run at startup, open Task Manager and go to Startup tab.

Right-click the column header, and enable Command-line

This shows which script is being executed (by WScript.exe or CScript.exe)

If the script is legitimate, then no problem. In that case, next thing is to remove the WScript restriction via the registry.

The command line is in the following 2 picture

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That surely was added by Malware. Be sure to run a full scan using MalwareBytes (https://www.malwarebytes.org/)

Until then, let the Windows Script Host restriction be enabled. Once you eliminate malware fully from the system, you can remove the WSH restriction by deleting the value named "Enabled" from these two registry keys:

HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host\Settings

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows Script Host\Settings

But do that only after cleaning your system.

I tried but it fails, its keep on displaying the same dialog box that windows script host access is disabled

That surely was added by Malware. Be sure to run a full scan using MalwareBytes (https://www.malwarebytes.org/)

Until then, let the Windows Script Host restriction be enabled. Once you eliminate malware fully from the system, you can remove the WSH restriction by deleting the value named "Enabled" from these two registry keys:

HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host\Settings

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows Script Host\Settings

But do that only after cleaning your system.