SFDX Deploy This Source to Org error, CLI not installed

[Lafexlos]

Summary

When using SFDX Deploy This Source to Org command for deploying my changes to a sandbox I am getting an error saying

The Salesforce CLI is not installed. Install it from https://developer.salesforce.com/tools/sfdxcli

Steps To Reproduce:

1. Create SFDX project with manifest
2. Authorize an org and retrieve using package.xml
3. Make some changes and use SFDX: Deploy Source to Org (sfdx force:source:deploy)

Expected result

Changes pushed to org successfully.

Actual result

Starting SFDX: Deploy Source to Org

sfdx force:source:deploy --json --loglevel fatal --sourcepath c:\Projects\MyPathToFile.cls
sfdx force:source:deploy --json --loglevel fatal --sourcepath c:\Projects\MyPathToFile.cls ended with error spawn sfdx ENOENT
The Salesforce CLI is not installed. Install it from https://developer.salesforce.com/tools/sfdxcli

Additional information

Starting to happen after the extension update.

VS Code Version:

1.28.2
7f3ce96ff4729c91352ae6def877e59c561f4850
x64

SFDX CLI Version:
sfdx-cli/6.38.0-0d66175ccf (windows-x64) node-v8.9.4

Salesforce CLI Integration Extension Version:
44.6.0

OS and version:
Windows 10

[skygiven]

Hello. I have the similar issue when try to deploy:
ended with error spawn C:\WINDOWS\system32\cmd.exe ENOENT

[ericrsmith35]

I have the same error when trying to deploy

[ntotten]

Can you tell me if this error goes away if you restart and open VS Code. If that doesn't work can you open the terminal and run sfdx update, wait a few minutes for it to finish, and then open VS Code and try again.

[lcampos]

Posting here as well to keep the threads updated. The issue was the same as the one reported in #737.
The fix is out now in the marketplace as part of version 44.6.1.

Again, apologies to everyone impacted and thanks for your patience.