If you use the steam version, you will have a problem using UEd. There have been a few solutions posted, but I don't know what the best method is.
I would recommend you use the stand-alone version anyway, then you can add whatever you like in your main install without getting odd map problems in UEd.
http://hof.entre-okc.com/forum/topic.as ... IC_ID=2466
Well by the sound of it I don't think it is the difference between OS that got you infected, so don't make the mistake of thinking you are better-off now

A quality AV package, and not using java and IE are a big help, but also not trusting files you got from somewhere that is not the authors own mirror.
There are various browser addons that help warn you about bad sites and files, or you can use to test remotely, so the file is inspected before you get it.
Never click on files or links in emails. Always "save-as..." or with links right-click and copy to a search bar or service like the VirusTotal plugin.
Set your web browsers to empty the cache when closed. If you need java do the same for java.
Using software with good security features, and knowing where they are is important.
I use Shareaza 2 for a lot of my downloading needs, as it connects to every useful p2p network and more, but also has useful security features, and other users can review files and mark them as infected when deleting, so other users will know before downloading.
Security rule No1: Never rely on defaults !
Security rule No2: Never rely on pre-installed anti-malware software. Choose your own. Wisely.
Most importantly and especially if you are about to do something stupid, not being in an admin profile is the biggest saviour.
Not being Admin will save your ass over 90% of the time.
As long as you know an admin account details, you can always elevate yourself when needed, so you can still be admin when needed.
Whether you use Win3.11, Win9x, ME, 2000, XP, 7, or 8 those are the things that avoid malware, no matter if the OS gets any more updates.
The common factor is not giving your PC a problem it has to deal with.
Sorry for the security lesson, but I think you will thank me later
https://vivaldi.net/forum/private-brows ... er-plugins
https://vivaldi.net/blogs/entry/online-anti-malware
https://vivaldi.net/blogs/entry/security