Boot fails post-restart after scan

On this laptop it was Windows Vista Home premium

I also have an external harddrive as well as a DVD burner on the other notebook...

OK...I have the Vista Home premium disk which is spotless...the Toshiba Satellite P100 disk is scratched

[Malware Removal Specialist]

You're getting me confused. Do you have the OS disk for the disfunctional computer?

yes

[Malware Removal Specialist]

1/ Click the Start button.

2/ From the Start Menu, Click All programs followed by Accessories.

3/ In the Accessories menu, Right Click on the Command Prompt option.

4/ From the drop down menu that appears, Click on the Run as administrator option.

5/ If you have the User Account Control (UAC) enabled you will be asked for authorisation prior to the command prompt opening. You may simply need to press the Continue button if you are the administrator or insert the administrator password etc.

6/ In the Command Prompt window, type: sfc /scannow and then press Enter.

7/ A message will appear stating that the system scan will begin.

8/ Be patient because the scan may take some time.

9/ If any files require replacing SFC will replace them. You may be asked to insert your Vista DVD for this process to continue.

10/ If everything is okay you should, after the scan, see the following message Windows resource protection did not find any integrity violations.

11/ After the scan has completed, Close the command prompt window.

I am running this thru Reatogo-X-PE as that is the only option available to me as I described earlier(it has Windows XP as the OS).  From Command Prompt, when I elect to Run As Administrator, it asks for a password which I have no knowledge of as this is Reatogo and nothing I set up.  I tried some of the obvious passwords such as admin, guest, password and just "ok" sans a password, but none of them work. Any ideas?

[Malware Removal Specialist]

What happens when you boot with your OS disk in?

After booting with the Windows Vista OS disk in, I chose Startup Repair.  After searching for problems and then repairing problems, the computer restarted.  It is now back to the original loop of Toshiba screen> Windows Error Recovery> Microsoft screen> blue screen, followed by Toshiba screen, etc..

Under Windows Error Recovery, when attempting Safe Mode or Safe Mode with Networking or Command Prompt, the Windows system 32 files and drivers are loaded then "Please wait..." is indicated for 30sec, followed by blue screen then loop resumes as indicated above. Last Known Good Configuration and Start Windows Normally result in Microsoft screen then blue screen, etc. as indicated above.

[Malware Removal Specialist]

I'm going to check with my colleagues about this problem.

Startup Repair in the Windows Vista Home Premium disk fixed the issue.

[Malware Removal Specialist]

Startup Repair in the Windows Vista Home Premium disk fixed the issue.

That's good news. So, everything is running well?

ran an ad-aware scan which found one high-level threat, removed and restarted w/ no issues; then ran a malwarebytes' scan which found one high level threat, removed and restarted successfully; Windows Defender scan run w/ no threats detected; so far, more than one day of running well with no issues; the Startup Repair on the full Vista OS disk was successful, whereas that of the Restore Only disk was not (initial attempt).