Guys before a few days i installed windows 10 but, avast free antivirus wont let me install it! im really dissapointed!!! i installed AVG antivirus but i dont really like it!! it shows to me virus to a nonsteam game! so i have now windows 8.1 and iam OK!!! in the next period i think microsoft will can solve this!! so what can we do??? BE PATIENT!!! 
Guys before a few days i installed windows 10No you didn't because W10 isn't released yet!
He refers to the Windows 10 Technical Preview, which was released since October 1, but Avast doesn’t work on Windows 10 for now. The conclusion of this is that we have to wait for an announcement or something that they tell that Windows 10 works on Avast, because it doesn’t work by now.
While I won’t agree that Tech preview is unstable I will say I have tested a few anti virus programs including the newest Avast 2015 without install issues but every antivirus besides the built in Defender has been getting false positives from main windows components even in a fresh install environment for right now I would suggest keeping to defender or praying that your faster than your AV quarantine routine and can keep it from removing a component like say the LoginUI that once stopped and quarantined will force the system to reboot and keep you from logging in without restoring to a system restore point
Well I wasn’t fast enough to stop newly installed Avast 2015 from marking several Win10 system files as root kit components… I however I did stop most of them by selecting “do nothing”. Now I have no keyboard driver. I can boot and mouse around just fine… cant type a password, or even hit ESC during boot… not sure what that’s all about… back to tinkering…
@ murr2k2 and drkstoner,
I don’t know what you two are smoking but Avast 2015 doesn’t yet work on Windows 2015.
Not even on the latest build Windows 10 build 9860.
http://www.screencast-o-matic.com/screenshots/u/Lh/1414245577310-99015.png
You can’t test what you can’t install.
No FP’s with Bitdefender free.
@BoB3160,
Well it did install, and without a hitch. It even scheduled a boot time scan. I wish I could prove it to ya, but I can’t get any number of keyboards to work in the various USB ports and hubs I’ve tried. … will get back to ya…
Maybe all the problems you’re having with Windows 10 are a reason why you were able to install avast.
It isn’t possible on a regular installation of Windows 10 to install the current version of Avast.
Hmm? I wasn’t having any problems with Windows 10 until after I installed Avast. (other than Windows 10 is just a modded Windows 8, which sucks. Microsoft is desperately trying to monetize a new version of Windows, but they haven’t got one, nor do we need one, but I digress)
To emphasize, Avast does NOT work on Windows 10 attempting to install it results in the following error:
http://www.screencast-o-matic.com/screenshots/u/Lh/1414245577310-99015.png
Unless you have somehow modified either Windows 10 or Avast.
If it won’t even install on some Win 10 systems, is it any surprise that on others where people have managed to squeak through the install there might be run-time problems?
Win 8.1.2 10 runs okay with the Microsoft-provided antimalware solution for now.
-Noel
Well like many others stated Avast isn’t yet ready for Win10 also the Technical Preview isn’t what Windows 10 will be in the end, for now it’s more under the hood testing than actual radical changes in UI or features, but they will slowly release by updates some consumer features, but not all i think as they got to hold something for the announcement day.
I doubt it. I think the last preview build will be a release candidate and there will be very few, if any, changes between it and the final release.
I was talking about Technical Preview, it’s not like i work for MS and know for sure, but these are Belfiore’s words, also a RC is too far from now to talk about it, but you are right, between RC and RTM there might be little to no changes
I need to add that after the update to build 9860 just now (forced reboot) avast managed to auto delete WWAHOST.EXE EXPLORER.EXE and BackgroundTransfer.exe without quarantaining or asking what to do… It just deleted them on the spot making any kind of “usage” of the OS impossible.
Been running Avast and W10 for quite some time now but this was something I didn’t suspect at all… Maybe look for false positives or a “version warning” before hitting the OMG it changed, - I am going to delete you now - solution…
Why even run avast or any other security software on Win10? ???
Win10, as stated many times before, isn’t even in the beta stage.
It’s way too early to even think about running avast on a Win10 system.
Interesting, as I believe you are the first I’ve read about here on the forum. ???
It doesn’t work on Windows 10 even with the latest release. Unless you hacked something ???
Yes, that’s why I found it interesting. 