End of support for Windows XP/Vista

[rocksteady]

Have you tried a clean install?

Well that was a predictable reply bob  .  I sort of knew that was coming after I posted. 
I was hoping to avoid that, even though I have both online and offine installers archived.
I just did a second restart after Repair, that seems to have changed things a bit. AvastUI not now swamping the CPU. AvastSvc pops up as significant CPU user but not hogging it all the time as AvastUI was proir to repair.
Fingers crossed Repair may have fixed it.

[bob3160]

Have you tried a clean install?

Well that was a predictable reply bob  .  I sort of knew that was coming after I posted. 
I was hoping to avoid that, even though I have both online and offine installers archived.
I just did a second restart after Repair, that seems to have changed things a bit. AvastUI not now swamping the CPU. AvastSvc pops up as significant CPU user but not hogging it all the time as AvastUI was proir to repair.
Fingers crossed Repair may have fixed it.

Good luck. How much ram dos this computer have?

[rocksteady]

Good luck. How much ram dos this computer have?

Old XP/Linux laptop has 2.5Gb RAM.
I have been keeping an eye on Task Manager and am glad to say the bad behaviour has not returned. Certainly sounds less stressed now.

[bob3160]

Good luck. How much ram dos this computer have?

Old XP/Linux laptop has 2.5Gb RAM.
I have been keeping an eye on Task Manager and am glad to say the bad behaviour has not returned. Certainly sounds less stressed now.

2.5 gig isn't bad. Your video is probably using 1/2 gig maybe more. The system will never be a speed demon.

[rocksteady]

Not good. AvastUI still stuck at 50% on one user account, but not so on the other user account.
Have done full avastclear uninstall, re-install but remains the same.
Also done a Rootkit scan and quick scan but both found nothing wrong.
So at the moment WinXP can be used by one user but the other.
Very strange.

[bob3160]

Not good. AvastUI still stuck at 50% on one user account, but not so on the other user account.
Have done full avastclear uninstall, re-install but remains the same.
Also done a Rootkit scan and quick scan but both found nothing wrong.
So at the moment WinXP can be used by one user but the other.
Very strange.

Did you install the product with admin. rights?
Right click on the installation file and select Run as administrator.

[rocksteady]

Did you install the product with admin. rights?

Yes. Removal and Re-Install all from Admin a/c
svchost.exe is using the other 50% CPU.

[rocksteady]

I seem to have removed scvhost.exe hogging CPU by turning off Microsoft Automatic Update.
That also seems to have helped with AvastUI.exe use of CPU which now rises to a peak but then falls back instead of sitting at a constant high level.
Jury is out whether this is a cure or not.

[Dix Huit]

I have had a similar situation running version 18.8.2356 on XP with Automatic Updates turned off: AvastUI.exe usually uses 50% CPU for a time after booting, but this eventually drops to 0% and mostly remains there.  I have had the Automatic Updates turned off for years, and so couldn't say if AvastUI.exe would remain at 50% should I have them on.  I hope you will have a similar experience. 

[rocksteady]

Well after suffering avastsvc.exe (was avastui.exe before) hogging 50% CPU, I got fed up and removed 18.8.2356 from my WinXP rig.
I then did a clean install of 18.5.2342 (build 18.5.3931.0). Annoyingly that took two attempts.
First time, even when I set Update Program = Manual, it somehow managed to update itself back to 18.8 
Second time it correctly asked if I wanted a Security Update, which I correctly rejected to retain 18.5.
Lets see if this version proves to be a bit kinder to my CPU.

[DavidR]

Fingers crossed

[=Snake=]

Well after suffering avastsvc.exe (was avastui.exe before) hogging 50% CPU, I got fed up and removed 18.8.2356 from my WinXP rig.
I then did a clean install of 18.5.2342 (build 18.5.3931.0). Annoyingly that took two attempts.
First time, even when I set Update Program = Manual, it somehow managed to update itself back to 18.8 
Second time it correctly asked if I wanted a Security Update, which I correctly rejected to retain 18.5.
Lets see if this version proves to be a bit kinder to my CPU.

Hi!

That was my experience, too. But I had to go back to 10.4.2233 as you can see in my sig.
BTW: Not using Windows services could make it difficult to keep your version safe. 
 
=Snake=