At least two issues here, maybe three.
First things first. What's the system spec for your machine - what's the CPU, what's the processor speed, how much RAM? You can hunt for the information in Windows, or get it from Speccy.
You can get some performance improvements by doing the usual things - delete any old and unwanted programs (Java is a prime candidate if you've got it; do you really need Flash/Adobe Reader/Silverlight et al?), run Disk Cleanup, schedule a chkdsk for the next reboot (check the box for Fix System File Errors), run Defrag. Beyond that you need to delve a little further and start disabling unneeded services and browser add-ons.
McSvHost can be instructed to restart automatically whenever it fails - then, it remains annoying but shouldn't mess up your browsing. You need to go into services.msc and call up the Properties for mcsvhost and change the settings.
As to possible infections : McAfee can be beaten, by so-called zero-day exploits. Then it's a case of catch-up. The best thing to do if you suspect something's there that McAfee can't detect is to get a second opinion - run a free scan from Microsoft and Malwarebytes. As you've got XP you can run Windows Defender alongside McAfee (although there's a performance hit at start-up).Message was edited by: Hayton - change link - on 09/05/12 00:40:09 IST
If you want to avoid all the grief that others have been discussing here for months, I'd suggest you remove McAfee completely. Go to there site for the instructions on how to do this. They also offer a clean up tool to remove any remnants. Then down load Microsoft Essentials from the Microsoft website. The reviews for it are very good and best of all it's free and it updates itself once per day automatically. I say this after being a McAfee customer for years. I have manged to stop the problems for me by removing SiteAdvisor. Unfortunately, for others that does not work .
If this problem is not fix for the rest of the McAfee community I will switch to Microsift Essentials at the end of the year when my subscription comes up for renewal.
I'm thinking this is the best advice. I've used McAfee for the past few years and had very few problems. Not the case this time. I did a review of their product and it's not very good.
I will take a look at Microsoft Essentials.. assuming it will work with Chrome. It's a bit discouraging (I know you know what I'm talking about). I JUST purchased Internet Security 2012. I haven't even been using it for a month yet. I don't have that kind of money to throw around.
I appreciate everyone's responses.
Thanks so much.
Please forgive my ignorance. I'm not much of a computer person. I will say this, however. When I sink $60.00 into an antivirus or computer protection program, I expect it to work. I don't want to have to wait for 'patches', 'fixes', or 'magic wands'. I feel that I shouldn't have to invoke the help of the 'Virtual Technician' or the 'Great Computer Gods'. At the price we pay for these programs, they should just WORK!!
When we purchase software here in Canada, and, I assume, everywhere else, once you open the product and use it, you cannot return it so basically... I am out $60.00 and my computer was compromised by the very program I bought to protect it. My system is running slow. 27 Trojan viruses and countless phishing and malware programs made their way right past the amazing force field of McAfee's Internet Security 2012 and I'm not sure I'll be able to fully repair my computer and not end up having to replace it (which I can't afford to do) at this point.
I've been following the posts and am extremely disappointed that these errors are still happening and that they're happening to so many people.
I, for one, will not purchase McAfee products again.
I have been having the same problem, an error message saying that McAfee Service Host has encountered a problem and needs to close. The main impact seems to be that it stops my internet browser from working (I am still connected to the internet, but when I try to open a new page, or refresh an already open page, it just hangs).
I am using a Dell PC, operating Windows XP.
My internet browser is Google Chrome (I tried to open pages in Firefox when it first happened and that was also affected)
My McAfee is through BT NetProtectPlus
Security Center: v11, build 11.0.623, last update 25/11/11
Virus Scan v15, build 15.0.294, last update 01/12/11, DAT version 6546
Personal Firewall v 3.4, build 184.108.40.206, last update 12/09/11
I will try running the MVT as mentioned above, but would love some feedback in the meantime on how to address this!
The same thing happens to me (McAfee service host has encountered a problem..). It mostly happens when I'm using VPN (Ivacy), but also randomly. I read up some on the subject and I reinstalled mcaffe - ran the MCPR.exe to clean everything out. Reinstalled. Still same.
Lastly I tried uninstalling the Mcafee siteadvisor which stopped the error message for a while until it popped up again today.
What bugs me the most is that mcAffee security center lets me now that the the firewall has gone down as well due to this error ... and that's not good (for obvious reasons!
I'm running on XP with firefox 8.0.1 and no siteadvisor:)
Pls check in on it since if it closes the firewall it must be a serious bug...
All the best,