First, you might just as well, since you have a new OS, get new applications to put on it.
Rather than use MS Office, a very viable alternative is open source (and FREE) OpenOffice.org; this suite has all the functionality that MS office has, and is almost completely compatible with Office file types.
To replace ACDSee, there are many free programs that work perfectly well. IrfanView is a very good editor, for example, and Picasa2 (free from Google) is a good viewer.
There is no reason to be condemned to using IE as your default browser, either; the free and open source Firefox, or the Mozilla suite, is a trendy and more fully-featured replacement.
Here is a rather complete list of alternate applications that you might want to consider. All have been used by members and all are without cost:http://www.bleepingcomputer.com/forums/Fre...apps-t3616.html
Lastly, do not rely on MS firewall, since it currently only checks incomming packets and ignores any outgoing ones that might be "calling home." There are several good free firewalls from which to choose.