PC wont let me install Malwarebytes

[Evolbob]

I have an old XP SP3 OS, that use to go surprisingly well, it has started to run the CPU at 50%, and wont allow me to install Malwarebytes.
I've removed the drives and had them scanned - with a few malware was found - nothing much else. Put them back into the PC (Athlon XP 2400+) and it is still basically the same.
Any suggestions?

Evolbob

 

[popatim]

I would restore the last working backup or fully format the drive and reinstall the OS. That will get ride of the pesky virus.

 

[Blackink]

Have you tried the install in Safe mode?

 

[Evolbob]

I would restore the last working backup or fully format the drive and reinstall the OS. That will get ride of the pesky virus.

I just replaced the drive, I think it was faulty. Then a full re-install with Windows XP on a new hard drive - lol.
And now it runs as expected.

 

[Evolbob]

Have you tried the install in Safe mode?

Yes, but one can't live in Safe Mode.
It worked better in SM but I couldn't solve or identify the problem within this environment.
Malwarebytes did manage to complete a Threat scan...in 10 hours.