Android Studio 4.2.2 Cannot install HAXM Emulator Accelerator - android-studio

Question

Emulators have been working find since v3.x in Android Studio for me on Windows 7.
Recently, it attempted to upgrade the HAXM and failed. Now attempting to start an emulator fails with "Could not start AVD". The message at the top of the AVD Manager says "HAXM device is not found. Troubleshoot.".
Clicking on Troubleshoot produces the following advice.
Enable VT-x in your BIOS security settings (it was working before and my bios should not have changed, so I have not looked at this)
ensure that HAXM is installed propertly (it is not; installation fails)
Try disabling 3rd party security software (nothing has changed here; using only Windows Defender)
If I go to "Tools > SDK Manager", "Apearance & Behavior > System Settings > Android SDK", "SDK Tools" Tab, and attempt to install Intel x86 Emulator Accelerator (HAXM installer) 7.6.5, it fails. This is what I get in the IDE log file...
2021-07-20 17:13:21,636 [ 724014] INFO - tools.idea.sdk.wizard.VmWizard - Parsing C:\Users\jjones\AppData\Local\Android\Sdk\tools\package.xml
2021-07-20 17:13:21,655 [ 724033] ERROR - ectedPackagesStep$CustomLogger - Failed to update status to COMPLETE
com.android.repository.api.PackageOperation$StatusChangeListenerException: HAXM setup failed!
at com.android.tools.idea.sdk.install.VmInstallListener.statusChanged(VmInstallListener.java:63)
at com.android.repository.impl.installer.AbstractPackageOperation.updateStatus(AbstractPackageOperation.java:508)
at com.android.repository.impl.installer.AbstractPackageOperation.complete(AbstractPackageOperation.java:207)
at com.android.tools.idea.sdk.wizard.InstallTask.completePackages(InstallTask.java:174)
at com.android.tools.idea.sdk.wizard.InstallTask.run(InstallTask.java:127)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:935)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsync$5(CoreProgressManager.java:442)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$null$3(ProgressRunner.java:235)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:170)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:629)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:581)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:60)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:235)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
at java.base/java.lang.Thread.run(Thread.java:834)
2021-07-20 17:13:21,657 [ 724035] ERROR - ectedPackagesStep$CustomLogger - Android Studio 4.2.2 Build #AI-202.7660.26.42.7486908
2021-07-20 17:13:21,657 [ 724035] ERROR - ectedPackagesStep$CustomLogger - JDK: 11.0.8; VM: OpenJDK 64-Bit Server VM; Vendor: N/A
2021-07-20 17:13:21,657 [ 724035] ERROR - ectedPackagesStep$CustomLogger - OS: Windows 7
2021-07-20 17:13:21,657 [ 724035] ERROR - ectedPackagesStep$CustomLogger - Last Action: Android.RunAndroidSdkManager
2021-07-20 17:13:21,657 [ 724035] INFO - ectedPackagesStep$CustomLogger - "Install Intel x86 Emulator Accelerator (HAXM installer) (revision: 7.6.5)" failed.
2021-07-20 17:13:21,658 [ 724036] INFO - ectedPackagesStep$CustomLogger - Failed packages:
2021-07-20 17:13:21,658 [ 724036] INFO - ectedPackagesStep$CustomLogger - - Intel x86 Emulator Accelerator (HAXM installer) (extras;intel;Hardware_Accelerated_Execution_Manager)
I know there are dozens of questions here on this or similar topics. I have tried many, to no avail. Others seem not to pertain to my situation.