I think I have a virus

[Yorky Lass]

I’m running XP Home, IE8. For over a week my back button has required several rapid clicks to work on some sites. I now have some unsavoury pop ups even though pop up blocker is turned on. System Restore will not work on any date either, it says it has failed. I have run a full scan on Malwarebytes and AVG but they show nothing. I have also run all these in Safe Mode and still get the same results.
I was wondering if I had a virus in System Restore itself. I know to turn it off and do a restart but if it wasn’t there then I loose all the restore points.
Has anyone any advice please?
I also have an external hard drive for back up and I know I have added a few files recently but can’t remember if it was before or after I noticed the back button not working. Once I have cleared my problem will it be best to delete everything on the external hard drive and back up again?
I have to go out now but will check back when I return.
Many thanks in advance.

[Yorky Lass]

I've over-installed IE8 but it hasn't solved the back button problem, I'll have to try Firefox .

[AlBags]

If you are there .. can you explain what you are actually getting .. and what sort of web page you are on (or is it any?)

[AlBags]

Type Your Answer Here...K ... Just read through previous message.

Did you install the hosts file mod ... downloaded from the website I posted ... and install it? (That's clicking on the mvps file)

[Yorky Lass]

I'm up because I can't sleep, but yippee! I've logged on and would you believe my back button is working.
Thank you so much Albags for all your help. Your persistance got me there.

[AlBags]

Ah!
Just seen this.
Everything better then now.
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