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I got this error code: 0xc000021a every time I tried to even install this Guest OS: Windows 8.1(32 bit Version)

can you help me even install Windows 8.1 as Guest OS here?

if you're wondering, my Host OS was a 64-bit version of Windows 7

ISTR that is the boot black screen error you get when you boot Windows 8.1 with an incorrect template. Check again that the correct OS version has been selected in the VM settings. In particular make sure you did not choose the 8.0 template, "Other Windows" or in fact anything else.

Btw, "even this" seems to be implying that "Windows 8.1 (32 bit)" is on the end of some kind of spectrum, though which one isn't clear to me. FYI, the requirements for Windows 8.1 (32bit) are essentially the same as Windows 8.1 (64 bit) and all later Windows. They are not the same as Windows 8.0 and earlier.

Make sure the VM is fully shut down, then right click it in the manager UI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Attach the zip here.

No, I was not wondering about your host - that and other info (e.g. VirtualBox version) is available in the VM log (which btw should be provided as a matter of course, so we should not need to wonder). Note however that Windows 7 is no longer a supported host for VirtualBox 6.1.x, although I do not expect that is the reason for the current guest boot failure.

mpack wrote: Make sure the VM is fully shut down, then right click it in the manager UI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Attach the zip here.

I has saved "VBox.log" into a zip file and attached that zip file in another post of mine(in another thread I authored here in Virtualbox forum)

Please post it here again, to save your fellow unpaid forum volunteers from having to use their own time to hunt it down. Thanks!

scottgus1 wrote:Please post it here again, to save your fellow unpaid forum volunteers from having to use their own time to hunt it down. Thanks!

I has attached the file here too

It crashed out because there was not enough memory available. How much RAM have you allocated to the vm? You only have about 1G available.
Windows 8.1, like Windows 10, prefers at least 2G RAM and 2 processors.

BillG wrote:It crashed out because there was not enough memory available. How much RAM have you allocated to the vm? You only have about 1G available.

Code: Select all

00:00:27.075720 Host RAM: 8062MB (7.8GB) total, 1117MB available

Code: Select all

00:00:55.211598 VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)
00:00:55.405464 Changing the VM state from 'RUNNING' to 'SUSPENDING'

Windows 8.1, like Windows 10, prefers at least 2G RAM and 2 processors.

I tried raising the Guest RAM and tried 2 processor and this still happens(if Host still have enough memory)

The VM's RAM was:

00:00:30.768187 RamSize <integer> = 0x0000000080000000 (2 147 483 648, 2 048 MB)

Look in the log for this line, and the line Bill quoted: "Host RAM .... available". Together they will tell if available RAM is enough for the VM's set RAM.

A new zipped vbox.log will be necessary for us to see what happened. (General concept: if a VM does not work after changing a setting, post a zipped vbox.log.)

scottgus1 wrote:The VM's RAM was:

00:00:30.768187 RamSize <integer> = 0x0000000080000000 (2 147 483 648, 2 048 MB)

Look in the log for this line, and the line Bill quoted: "Host RAM .... available". Together they will tell if available RAM is enough for the VM's set RAM.

A new zipped vbox.log will be necessary for us to see what happened. (General concept: if a VM does not work after changing a setting, post a zipped vbox.log.)

I has uploaded newly zipped vbox.log file here again