Programs missing in Start Menu and admin permission lost

Post the AdWareCleaner text, please.

I want you to totally un-install Firefox and Google Chrome .... you've picked up a bunch unwanted garbage!!

After you've done that, download TFC by Old Timer TFC - Temp File Cleaner by OldTimer - Geeks to Go Forums and save it to your desktop.
Save any unsaved work. TFC will close ALL open programs including your browser!
Double-click on TFC.exe to run it. If you are using Vista/Windows 7 right-click on the file and choose Run As Administrator.
Click the Start button to begin the cleaning process and let it run uninterrupted to completion.
Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.

When your computer has rebooted, make sure "Proxy server" is disabled under your LAN Settings.
1) Under “Tools” in the browser tool bar select “Internet Options”.
2) In the “Internet Options” window that pops up, click the “Connections” tab at the top.
3) Click “LAN Settings” near the bottom of the “Connections” section.
4) If the “Proxy server” checkbox is marked with a check, click it to deselect/uncheck it.
5) Click “Ok” to close the “Local Area Network (LAN) Settings” window.
6) Click “Ok” to close the “Internet Options” window.
Reboot once again.

Now, using IE, can you update 2 or 3 Windows 'critical/important' listed items? Don't do any more than that for now. Let me know if you were successful or failed.

If the updates failed, let me know which ones.

I am unable to swtich on Windows Firewall or Defender.... I don't have any anti-viris installed... and PC will not allow me to install ....

programs remain in Start menu

there are about 84 windows updates... due to be installed...

I have paid for McAfee

Look in services and see if McAfee firewall is set to 'Automatic' and turned on. If it is, it has stopped Windows Firewall from running.

Download Security Check by screen317 from here http://screen317.spywareinfoforum.org/SecurityCheck.exe or here http://screen317.spywareinfoforum.org/
Save it to your Desktop.
Double click SecurityCheck.exe and follow the onscreen instructions inside of the black box.
A Notepad document should open automatically called checkup.txt.
Please post the contents of that document.
************
Download CKScanner from here http://downloads.malwareremoval.com/CKScanner.exe
Save it to your desktop. <=== IMPORTANT
Doubleclick CKScanner.exe and click Search For Files.
After a very short time, when the cursor hourglass disappears, click Save List To File.
A message box will verify that the file is saved.
Double-click the CKFiles.txt icon on your desktop and copy/paste the contents in your next reply.

Are you still with me Neil?